五年级下册的脱式和简算题100道带答案
100道五年级脱式计算题带答案和过程都有哪些?
5.41.8+2401.5=3+360=363
900072(1.250.78)=9000727=1257=875
1.25(8+10)=1.258+1.2510=10+12.5=22.5
1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78
1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/5
4800254=4800(25x4)=4800100=4800100=48
2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/8
3/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/7
3.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=1
0.4125250.8=(0.425)(1250.8)=10100=1000
1.25(8+10)=1.258+1.2510=10+12.5=22.5
9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2
1.248.3+8.31.76=8.3(1.24+1.76)=8.33=24.9
99991001=9999(1000+1)=99991000+99991=10008999
14.86.3-6.36.5+8.33.7=(14.8-6.5)6.3+8.33.7=8.36.3+8.33.7=8.3(6.3+3.7)
=8.310=83
1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78
933-157-43=933-(157+43)=933-200=733
4821-998=4821-1000+2=3823
3212525=4812525=(425)(8125)=1001000=100000
1.8+181.5-0.50.3=1.8+12-0.15=13.8-0.15=13.65
6.58+3.58-47=52+28-47=80-47=33
3.7x2.56-2.3=9.472-2.3=7.172
1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78
1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/5
4800254=4800(25x4)=4800100=4800100=48
2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/8
3/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/7
3.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=1
0.4125250.8=(0.425)(1250.8)=10100=1000
1.25(8+10)=1.258+1.2510=10+12.5=22.5
9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2
1.248.3+8.31.76=8.3(1.24+1.76)=8.33=24.9
61-(1.25+2.50.7)=61-3=58
[(10-0.8)+9.85]-20.125=19.05-20.125=19.05-16=3.05
408-1224 = 408 - 288 = 120(46+28)60 = 74 x 60 = 4440
4250-17 = 2100- 17 = 2083
32+1055 = 32 + 21 = 53
420(327-238) = 420 x 89 = 37380
(4121+2389)7 = 6510 7 = 930
3.416(0.01635) = 3.416 0.56 = 6.1
0.8[(10-6.76)1.2] = 0.8 x(3.241.2) = 0.8 x 2.7 = 2.16
5.670.2-0.62 = 1.134-0.62 = 0.514
0.40.70.25 = 0.4 x 0.25 x 0.7 = 0.1 x 0.7 = 0.07
0.78+5.436+1 = 6.216 +1 = 7.216
30.8[14-(9.85+1.07)] = 30.8 (14 - 10.92) = 30.83.08 = 10
[60-(9.5+28.9)]0.18 = (60- 38.4)0.18 = 21.6 0.18 = 120
2.8810.43-0.243.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.86
5.38+7.85-5.37= 13.23 - 5.37=7.86
7.20.8-1.25=9 - 6 =3
6-1.193-0.43= 6-3.57 - 0.43 = 6- (3.57 + 0.43) = 6-4 = 2
6.5(4.8-1.24)= 6.5 x(4.8 - 4.8 )=6.5 x0 = 0
0.681.9+0.321.9 = (0.68 + 0.32) x1.9 = 1 x 1.9 = 1.9
10.15-10.750.4-5.7 = 10.15 - 4.3 - 5.7 = 10.15 -(4.3 + 5.7)=10.15 - 10 =0.15
5.8(3.87-0.13)+4.23.74 = 5.8 x 3.74 +4.2 x 3.74 = (5.8 +4.2)x3.74 = 10 x 3.74 = 37.4
20[(2.44-1.8)0.4+0.15] = 20x (0.64 0.4 +0.15)= 20x(1.6 +0.15) = 20 x1.75 = 35
28-(3.4+1.252.4) = 28 - (3.4 + 3) = 28 - 6.4 = 21.6
2.557.1+2.457.1 = (2.55 + 2.45) x7.1 = 5 x7.1=35.5
0.8〔15.5-(3.21+5.79)〕 = 0.8 x (15.5 - 9) = 0.8 x 6.5 = 5.2
(31.8+3.24)5 = (31.8 + 12.8)5 = 44.65 = 8.92
31.54(6+3) = 126 9 = 14
22.5+2.52 = 0.8 + 1.25 =2.05
194-64.81.80.9 = 194 -36 x0.9 = 194-32.4 = 161.65180-7056 = 5180 - 4230=950
242.4-2.50.8 =10 -2=8
405(3213-3189) =405x2AJmTDSTWIR4 = 9720
125(97-81) =125x16 =2000
6942+4803 = 6942 + 160 = 6782
20+804-20 = 20 + 20 -20 = 40 -20 = 20
100(32-30)0 = 100 2 x0= 50 x0 = 0
254-125 = 100 - 60 = 40
70〔(42-42)18〕=70 x (018) = 70x0 = 0
7565+7535 = 75 x (65 +35) = 75x100 = 7500
6-1.64= 6- 0.4 = 5.6
32.52-(6+9.7283.2)2.5 = 32.52 - (6+3.04)x2.5 = 32.52 - 9.02 x 2.5 = 32.52 -22.55 = 9.97
(136+64)(65-34523)= 200x(65-15) = 200x 50=10000
999910www.rixia.cc01=9999(1000+1)=99991000+99991=10008999
14.86.3-6.36.5+8.33.7=(14.8-6.5)6.3+8.33.7=8.36.3+8.33.7=8.3(6.3+3.7)
=8.310=83
=(0.4+0.6)5.2
=15.2
=5.2
同学,自己想吧🙂
=(100+1)99
=10099+199
=9900+99
=9999
五年级下册分数简便运算计算题100道 (要脱式,要加减)
1) 3/7+3/7=6/7
2) 7/10+2/10=9/10
3) 4/7-3/7=1/7
4) 3/14+7/14=5/7
5) 4/11+5/11=9/11
6) 4/15+2/15=2/5
7) 9/10-3/10=6/10
8) 7/13+5/13=12/13
9) 6/13+5/13=11/13
10) 2/8+3/8=5/8
11) 9/13-9/13=0
12) 9/13+3/13= 12/13
13) 11/12-4/12=7/12
14) 14/15-3/15=11/15
15) 1/13+11/13=12/13
16) 2/15-2/15=0
17) 7/12+3/12=5/6
18) 12/15-9/15=1/5
19) 1/8+2/8=3/8
20) 6/7-6/7= 0
21) 10/13+2/13=12/13
22) 2/13+7/13=9/13
23) 1/11+8/11=9/11
24) 3/4-1/4= 1/2
25) 4/15+10/15=14/15
26) 12/14-4/14=4/7
27) 7/13+2/13=9/13
28) 8/13-1/13=7/13
29) 12/14-12/14=0
30) 12/13-6/13=6/13
分数简便运算计算题:
1、3/7+3/7=6/7
2、7/10+2/10=9/10
3、4/7-3/7=1/7
4、3/14+7/14=5/7
5、4/11+5/11=9/11
6、4/15+2/15=2/5
7、9/10-3/10=6/10
8、7/13+5/13=12/13
9、6/13+5/13=11/13
10、2/8+3/8=5/8
11、9/13-9/13=0
在数的运算中
有加(+)、减(-)、乘()、除()四种运算,我们在数学上又为了能更简便计算,简称称作简算,简算有以下几种(公式详见在常用特殊数的乘积、及简算公式)
加法:(加法交换律) (加法结合律)(近似数)
乘法:(乘法交换律)(乘法结合律)(乘法分配律)(乘法分配律变化式(四个))
减法:(减法的基本性质)(近似数)
除法:(除法的基本性质)(商不变的性质)
以上内容参考:百度百科-简算
3+14/7+4+14/7
小学五年级小数脱式简便计算题带答案有哪些?
(46+28)60 = 74 x 60 = 4440
4250-17 = 2100- 17 = 2083
32+1055 = 32 + 21 = 53
420(327-238) = 420 x 89 = 37380
(4121+2389)7 = 6510 7 = 930
3.416(0.01635) = 3.416 0.56 = 6.1
0.8[(10-6.76)1.2] = 0.8 x(3.241.2) = 0.8 x 2.7 = 2.16
5.670.2-0.62 = 1.134-0.62 = 0.514
0.40.70.25 = 0.4 x 0.25 x 0.7 = 0.1 x 0.7 = 0.07
0.78+5.436+1 = 6.216 +1 = 7.216
30.8[14-(9.85+1.07)] = 30.8 (14 - 10.92) = 30.83.08 = 10
[60-(9.5+28.9)]0.18 = (60- 38.4)0.18 = 21.6 0.18 = 120
2.8810.43-0.243.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.86
【简便计算】
简便计算是一种特殊的计算,它运用了运算定律与数字的基本性质,从而使计算简便,使一个很复杂的式子变得很容易计算出得数。
【脱式计算】
即递等式计算,需将一系列的数字逐步计算。在脱式计算中要先算乘、除法,后算加、减法。在乘除法连继计算时中,要按从左往右的顺序依次计算,在四则运算中,加法和减法叫做第一级运算,乘法和除法叫做第二级运算。
【注意事项】
在进行简便运算( 四则运算)时,应注意运算符号(乘除和加减)和大、中、小括号之间的关连。不要越级运算,以免发生运算错误。
【乘法分配律】
简便计算中最常用的方法是 乘法分配律。乘法分配律指的ax(b+c)=axb+axc其中a,b,c是任意实数。相反的,axb+axc=ax(b+c)叫做乘法分配律的逆运用(也叫提取 公约数),尤其是a与b互为补数时,这种方法更有用。
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50道五年级脱式计算题带过程和答案,有答案和过程的加分,谢谢了。
对不起,给你说几道就行了,因为给你说了,我们还要因为这个给你算题呀,我给你推送一个,用作业帮或者快对作业就行 0.460.254 =0.2540.4 =10.4 =0.4 132+1237 =132+314 =446 319+3256 =319+1512 =1831 250+23+38 =250+624 =874
839 浏览230512019-11-08
100道五年级脱式计算题带答案和过程都有哪些?
5.41.8+2401.5=3+360=363 900072(1.250.78)=9000727=1257=875 1.25(8+10)=1.258+1.2510=10+12.5=22.51.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78 1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/5 4800254=4800(25x4)=4800100=4800100=48 2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/8 3/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/7 3.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=1 0.4125250.8=(0.425)(1250.8)=10100=1000 1.25(8+10)=1.258+1.2510=10+12.5=22.5 9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2 1.248.3+8.31.76=8.3(1.24+1.76)=8.33=24.9 99991001=9999(1000+1)=99991000+99991=10008999 14.86.3-6.36.5+8.33.7=(14.8-6.5)6.3+8.33.7=8.36.3+8.33.7=8.3(6.3+3.7)=8.310=83 1.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78 933-157-43=933-(157+43)=933-200=733 4821-998=4821-1000+2=3823 3212525=4812525=(425)(8125)=1001000=100000 1.8+181.5-0.50.3=1.8+12-0.15=13.8-0.15=13.65 6.58+3.58-47=52+28-47=80-47=33 3.7x2.56-2.3=9.472-2.3=7.1721.24+0.78+8.76=(1.24+8.76)+0.78=10+0.78=10.78 1/2-(4/5-1/2)=1/2+1/2-4/5=1-4/5=1/5 4800254=4800(25x4)=4800100=4800100=48 2/5-(3/8-3/5)=2/5+3/5-3/8=1-3/8=5/8 3/4-(3/7-1/4)=3/4+1/4-3/7=1-3/7=4/7 3.2x0.125x2.5=0.125x8x(0.4x2.5)=1x1=1 0.4125250.8=(0.425)(1250.8)=10100=1000 1.25(8+10)=1.258+1.2510=10+12.5=22.5 9123-(123+8.8)=9123-123-8.8=9000-8.8=8991.2 1.248.3+8.31.76=8.3(1.24+1.76)=8.33=24.9 61-(1.25+2.50.7)=61-3=58 [(10-0.8)+9.85]-20.125=19.05-20.125=19.05-16=3.05 408-1224 = 408 - 288 = 120(46+28)60 = 74 x 60 = 4440 4250-17 = 2100- 17 = 2083 32+1055 = 32 + 21 = 53 420(327-238) = 420 x 89 = 37380 (4121+2389)7 = 6510 7 = 930 3.416(0.01635) = 3.416 0.56 = 6.1 0.8[(10-6.76)1.2] = 0.8 x(3.241.2) = 0.8 x 2.7 = 2.16 5.670.2-0.62 = 1.134-0.62 = 0.514 0.40.70.25 = 0.4 x 0.25 x 0.7 = 0.1 x 0.7 = 0.07 0.78+5.436+1 = 6.216 +1 = 7.216 30.8[14-(9.85+1.07)] = 30.8 (14 - 10.92) = 30.83.08 = 10 [60-(9.5+28.9)]0.18 = (60- 38.4)0.18 = 21.6 0.18 = 120 2.8810.43-0.243.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.86 5.38+7.85-5.37= 13.23 - 5.37=7.86 7.20.8-1.25=9 - 6 =3 6-1.193-0.43= 6-3.57 - 0.43 = 6- (3.57 + 0.43) = 6-4 = 2 6.5(4.8-1.24)= 6.5 x(4.8 - 4.8 )=6.5 x0 = 0 0.681.9+0.321.9 = (0.68 + 0.32) x1.9 = 1 x 1.9 = 1.9 10.15-10.750.4-5.7 = 10.15 - 4.3 - 5.7 = 10.15 -(4.3 + 5.7)=10.15 - 10 =0.15 5.8(3.87-0.13)+4.23.74 = 5.8 x 3.74 +4.2 x 3.74 = (5.8 +4.2)x3.74 = 10 x 3.74 = 37.4 20[(2.44-1.8)0.4+0.15] = 20x (0.64 0.4 +0.15)= 20x(1.6 +0.15) = 20 x1.75 = 35 28-(3.4+1.252.4) = 28 - (3.4 + 3) = 28 - 6.4 = 21.6 2.557.1+2.457.1 = (2.55 + 2.45) x7.1 = 5 x7.1=35.5 0.8〔15.5-(3.21+5.79)〕 = 0.8 x (15.5 - 9) = 0.8 x 6.5 = 5.2 (31.8+3.24)5 = (31.8 + 12.8)5 = 44.65 = 8.92 31.54(6+3) = 126 9 = 14 22.5+2.52 = 0.8 + 1.25 =2.05 194-64.81.80.9 = 194 -36 x0.9 = 194-32.4 = 161.65180-7056 = 5180 - 4230=950 242.4-2.50.8 =10 -2=8 405(3213-3189) =405x24 = 9720 125(97-81) =125x16 =2000 6942+4803 = 6942 + 160 = 6782 20+804-20 = 20 + 20 -20 = 40 -20 = 20 100(32-30)0 = 100 2 x0= 50 x0 = 0 254-125 = 100 - 60 = 40 70〔(42-42)18〕=70 x (018) = 70x0 = 0 7565+7535 = 75 x (65 +35) = 75x100 = 7500 6-1.64= 6- 0.4 = 5.6 32.52-(6+9.7283.2)2.5 = 32.52 - (6+3.04)x2.5 = 32.52 - 9.02 x 2.5 = 32.52 -22.55 = 9.97 (136+64)(65-34523)= 200x(65-15) = 200x 50=10000
1420 浏览58842020-03-06
五年级脱式简便运算200道,及答案
3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5 7.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7) 3.29+0.73-2.29+2.27 3.290.254 0.1258.8 0.250.28 0.1253.22.5 3540.2 0.2540.254 3.59.9 3.599+3.5 3.5101-3.5 3.59.9+3.50.1 3.52.7+350.73 3.52.7-3.50.7 (32+5.6)0.8 3.50.6-0.50.6 4.93.5 70.254 70.125 7.35(7.350.25) 7.35(7.350.25) 3.07-0.38-1.62 1.29+3.7+2.71+6.3 8-2.45-1.55 3.25+1.79-0.59+1.75 23.4-0.8-13.4-7.2 0.32403 3.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.2536 12.7-(3.7+0.84) 36.54-1.76-4.54 0.250.734 7.60.8+0.27.6 0.85199 0.258.54 1.288.6+0.728.6 12.50.960.8 10.4-9.60.35 0.8(4.31.25) 3.12+3.1299 28.6101-28.6 (4.23+6.17)0.8 0.8615.7-0.8614.7 2.4102 14-7.32-2.68 2.64+8.67+7.36+11.33 2.311.20.5 (2.5-0.25)0.4 9.161.5-0.59.16 3.6-3.60.5 4.51.8 4.23.5 9300.65 63.42.50.4 4.91.4 3.9(1.35) (7.7+1.54)0.7 2.52.4 2.745 0.351.2520.8 32.40.9+0.132.4 150.25 7028 15(0.150.4) 4.252.59.9+0.17 3.29+0.73+2.27 3.29-0.73-2.27 7.5+2.5-7.5+2.5 7.325-3.29-3.325 7.325-(5.325+1.7) 7.325-(5.325-1.7) 3.29+0.73-2.29+2.27 3.290.254 0.1258.8 0.250.28 0.1253.22.5 3540.2 0.2540.254 3.59.9 3.599+3.5 3.5101-3.5 3.59.9+3.50.1 3.52.7+350.73 3.52.7-3.50.7 (32+5.6)0.8 3.50.6-0.50.6 4.93.5 70.254 70.125 7.35(7.350.25) 7.35(7.350.25) 3.07-0.38-1.62 1.29+3.7+2.71+6.3 8-2.45-1.55 3.25+1.79-0.59+1.75 23.4-0.8-13.4-7.2 0.32403 3.2+0.36+4.8+1.64 1.23+3.4-0.23+6.6 0.2536 12.7-(3.7+0.84) 36.54-1.76-4.54 0.250.734 7.60.8+0.27.6 0.85199 0.258.54 1.288.6+0.728.6 12.50.960.8 10.4-9.60.35 0.8(4.31.25) 3.12+3.1299 28.6101-28.6 (4.23+6.17)0.8 0.8615.7-0.8614.7 2.4102 14-7.32-2.68 2.64+8.67+7.36+11.33 2.311.20.5 (2.5-0.25)0.4 9.161.5-0.59.16 3.6-3.60.5 4.51.8 4.23.5 9300.65 63.42.50.4 4.91.4 3.9(1.35) (7.7+1.54)0.7 2.52.4 2.745 0.351.2520.8 32.40.9+0.132.4 150.25 7028 15(0.150.4) 4.252.59.9+0.17 6.9+4.8+3.1 15.89+(6.75-5.89) 7.85+2.34-0.85+4.66 35.6-1.8-15.6-7.2 13.75-(3.75+6.48) 47.8-7.45+2.55 66.86-8.66-1.34 0.2516.24 0. 2532 0.125 2 .5 (4 +0.4) (1.25-0.125)8 4.8100.1 4.299 56.59.9+56.5 5.411-5.4 3.834.56+3.835.44 7.0910.8-0.87.09 3.654.7-36.50.37 13.70AJmTDSTWIR.25-3.74 10.716.1-1.110.7 +10.7 5 4.91.4 3.9(1.35) 63.42.50.4 (7.7+1.4)0.7 18 (2+9) 1. 0.18 +4.26 -0.18 +4.26 ☆ 2. 0.58 1.3 0.58 1.3 ☆ 3. 7.3 4 + 2.7 0.25 ☆ 4. 3.75 0.5 - 2.75 2 ☆ 5. 5.26 0.125 + 2.74 8 ☆ a b c = a (b c) 6. 6.3 1.8 7. 4.2 3.5 8. 9.5 (1.9 8) 9. 12.8 (0.4 1.6) 10. 930 0.6 5 11. 63.4 2.5 0.4 12. (7.7 + 1.54) 0.7 ☆ 13. (11.7 + 9.9) 0.9 ☆ 1. 0.45 201 2. 0.58 10.1 3. 50.2 99 4. 4.7 9.9 5. 3.28 5.7 + 6.72 5.7 6. 2.1 99 + 2.1 7. 1.7 9.9 + 0.17 8. 23 0.1 + 2.3 9.9 玩转TA0001A 2014-11-16 其他类似问题 求100道小学五年级简便计算.急!谢谢!2014-10-27 我要的就是题,2014-10-22 五年级小数简便运算200道急2014-10-22 1题是:13.91乘8+6.09除0.125 二题是:2.93乘5.4+29.3除0.462014-11-13 0.258.19-0.254.192014-10-15 其他回答 26-14)8 50(2+80) (1012)-63 (27-23)12 (38-16)24 (24+38)6 (87-42)15 (84-153) 16(49-28) 45(84-48] ) (58+37)6 ... 展开 fangjg 2014-11-17 一、观察下面的算式,它们是根据什么定律或性质成立的: 第一组 12525=(1254)(254) 7000125=(70008)(1258) 6400800=(6400100)(800100) 第二组 7899=78100-781 5895+4295=(58+42)95 (125+23)8=125... 展开 63846249624694 2014-11-16 ©2017 作业帮 联系方式:service
103 浏览62792017-08-26
小学五年级数学(上册)脱式计算200题.简便运算150另附加答案
6.9+4.8+3.1 0.456+6.22+3.78 15.89+(6.75-5.89) 4.02+5.4+0.98 5.17-1.8-3.2 13.75-(3.75+6.48) 3.68+7.56-2.68 7.85+2.34-0.85+4.66 35.6-1.8-15.6-7.2 3.82+2.9+0.18+9.1 9.6+4.8-3.6 7.14-0.53-2.47 5.27+2.86-0.66+1.63 13.35-4.68+2.65 73.8-1.64-13.8-5.36 47.8-7.45+8.8 0.398+0.36+3.64 15.75+3.59-0.59+14.25 66.86-8.66-1.34 0.2516.24 (1.25-0.125)8 3.6102 3.723.5+6.283.5 36.8-3.9-6.1 15.613.1-15.6-15.62.1 4.87.8+780.52 32+4.9-0.9 4.8100.1 56.59.9+56.5 7.0910.8-0.87.09 25.48-(9.4-0.52) 4.23.5 3201.258 18.769.9+18.76 3.522.50.4 先给你这么多了,要是答案的话,可以自己做完了再给爸妈检查,如果要答案抄的话,这些题是不会记在脑子里的。 3.9-4.1+6.1-5.9
355 浏览12450
小学五年级小数脱式简便计算题带答案
小学五年级小数脱式简便计算题案例如下: 计算技巧:在两个数a、b同时乘以或者处以相同数c,然后进行加减的时候,可以先加减a、b这两个数,然后在与c进行乘除计算,如下: 0.52-0.152=(0.5-0.15)2=0.352=0.175; 0.5X2-0.15X2=(0.5-0.15)X2=0.35X2=0.7; 计算技巧:在加减乘除中非上例条件时候,即abcd四个自然数没有规律的时候,进行加减乘除,要先进行乘除(先算ab和cd),最后进行加减运算,如下: 2.8810.43-0.243.5=6.7-0.24 x3.5= 6.7-0.84=5.86; 计算技巧:在运算符号大、中、小括号与乘除加减之间,先运算大括号内小括号中的数,然后计算大括号中的数,最后在进行括号外的数的乘除加减运算,如下: 30.8[14-(9.85+1.07)]=30.8(14-10.92)=30.83.08=10; 扩展资料: 简便计算:简便计算是一种特殊的计算,它运用了运算定律与数字的基本性质,从而使计算简便,使一个很复杂的式子变得很容易计算出最终得数。 脱式计算:即递等式计算,需将一系列的数字逐步计算。在脱式计算中要先算乘、除法,后算加、减法。在乘除法连继计算时中,要按从左往右的顺序依次计算,在四则运算中,加法和减法叫做第一级运算,乘法和除法叫做第二级运算。 乘法分配律:简便计算中最常用的方法是乘法分配律。乘法分配律指的ax(b+c)=axb+axc其中a、b、c是任意实数。相反的,axb+axc=ax(b+c)叫做乘法分配律的逆运用(也叫提取公约数),尤其是a与b互为补数时,这种方法更有用。 注意事项:在进行简便运算(四则运算)时,应注意运算符号(乘除和加减)和大、中、小括号之间的关联。不要越级运算,以免发生运算错误。
21 浏览86932020-01-15
评论两句41
408-1224 = 408 - 288 = 120
(46+28)60 = 74 x 60 = 4440
4250-17 = 2100- 17 = 2083
32+1055 = 32 + 21 = 53
420(327-238) = 420 x 89 = 37380
(4121+2389)7 = 6510 7 = 930
3.416(0.01635) = 3.416 0.56 = 6.1
0.8[(10-6.76)1.2] = 0.8 x(3.241.2) = 0.8 x 2.7 = 2.16
5.670.2-0.62 = 1.134-0.62 = 0.514
0.40.70.25 = 0.4 x 0.25 x 0.7 = 0.1 x 0.7 = 0.07
0.78+5.436+1 = 6.216 +1 = 7.216
30.8[14-(9.85+1.07)] = 30.8 (14 - 10.92) = 30.83.08 = 10
[60-(9.5+28.9)]0.18 = (60- 38.4)0.18 = 21.6 0.18 = 120
2.8810.43-0.243.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.86
(46+28)60 = 74 x 60 = 4440
4250-17 = 2100- 17 = 2083
32+1055 = 32 + 21 = 53
420(327-238) = 420 x 89 = 37380
(4121+2389)7 = 6510 7 = 930
3.416(0.01635) = 3.416 0.56 = 6.1
0.8[(10-6.76)1.2] = 0.8 x(3.241.2) = 0.8 x 2.7 = 2.16
5.670.2-0.62 = 1.134-0.62 = 0.514
0.40.70.25 = 0.4 x 0.25 x 0.7 = 0.1 x 0.7 = 0.07
0.78+5.436+1 = 6.216 +1 = 7.216
30.8[14-(9.85+1.07)] = 30.8 (14 - 10.92) = 30.83.08 = 10
[60-(9.5+28.9)]0.18 = (60- 38.4)0.18 = 21.6 0.18 = 120
2.8810.43-0.243.5 = 6.7 - 0.24 x3.5 = 6.7 - 0.84 = 5.86
五年级下册脱式计算题及答案
一、5.41.8+2401.5
=3+360
=363
二、900072(1.250.78)
=9000727
=1257
=875
三、61-(1.25+2.50.7)
=61-3
=58
四、[(10-0.8)+9.85]-20.125
=19.05-20.125
=19.05-16
=3.05
=(12.5x8)x(25x4)
=100x100
=10000
101x54
=(100+1)x54
=100x54+54x1
=5454
8.56x99
=8.56x(100-1)
=8.56x100-1x8.56
=856-8.56
=856.35
脱式计算,即递等式计算,需将一系列的数字逐步计算。在脱式计算中要先算乘、除法,后算加、减法。在乘除法连继计算时中,要按从左往右的顺序依次计算,在四则运算中,加法和减法叫做第一级运算,乘法和除法叫做第二级运算。
2、主要掌握的是记住要先算乘、除法,后算加、减法。在乘除法连继计算时中,要按从左往右的顺序依次计算。遇到括号,要首先计算括号内部。
3、在脱式过程中要按运算顺序划出运算顺序线,还要做到“三核对”,一要核对从书上把题抄到作业本上数字、符号是否抄对。二要核对从横式抄到草稿竖式的数字、符号是否抄对。三要核对把草稿竖式上的得数,抄到横式上是否抄对,小数点是否点对地方,有无遗漏。
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五年级下册脱式计算题及答案
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=3+360
=363
二、900072(1.250.78)
=9000727
=1257
=875
三、61-(1.25+2.50.7)
=61-3
=58
四、[(10-0.8)+9.85]-20.125
=19.05-20.125
=19.05-16
=3.05
1、脱式计算,即递等式计算,需将一系列的数字逐步计算。在脱式计算中要先算乘、除法,后算加、减法。在乘除法连继计算时中,要按从左往右的顺序依次计算,在四则运算中,加法和减法叫做第一级运算,乘法和除法叫做第二级运算。
=(31.8+12.8)5
=44.65
=8,92,
31.54(6+3)
=31.549
=1269
=14.
0.64257.8+2.2
=124.8+2.2
=127.
=0.2008(1+10+100+1000+10000)
=0.200811110
=2230.888
2、1(23)(34)(45)(56)……(20072008)=13/24/35/46/5……2008/2007
=2008
3、1+1/3+1/6+1/10+……+1/20091004
=2(1/2+1/6+1/12+1/20+……+1/20082009)
=2(1-1/2+1/2-1/3+1/3-1/4+……+1/2008-1/2009)
=2(1-1/2009)
=22008/2009
=4016/2009
4、2006个2006乘2007个2007再乘2008个2008的积的个位数是?
2006个2006的个位数字是6
2007个2007的个位数字是3
2008个2008的个位数字是6
636=108
所以2006个2006乘2007个2007再乘2008个2008的积的个位数字是8
5、325.24+425.24+625.24+925.24+525.24
=(300+400+600+900+500)+25.245
=2700+126.2
=2826.2
6、1/14+1/47+1/710+1/1013+……+1/20052008
=(1-1/4+1/4-1/7+1/7-1/10+1/10-1/13+……+1/2005-1/2008)3
=(1-1/2008)3
=2007/20083
=669/2008
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