十道简便小数乘法计算要答案

[求15道分数混合运算其中要有6道简便计算]1.3/7 * 49/9 - 4/3 2.8/9 * 15/36 + 1/27 3.12* 5/6 – 2/9 *3 4.8* 5/4 + 1/4 5.6÷ 3/8 – 3/8 ÷6 6.4/7 * 5/9 + 3/7 * 5/9 7.5/2 -( 3/2 + 4/5 ) 8.7/8 + ( 1/8 + 1/9...+阅读

十道简便小数乘法计算要答案

(1)2.64*1.7-2.64*0.7

=2.64*(1.7-0.7)

=2.64*1

=2.64

(2)31.5*1.07-3.15*0.7

=3.15*10.7-3.15*0.7

=3.15*(10.7-0.7)

=3.15*10

=31.5

(3)2.7*5.7-2.7+5.3*2.7

=2.7*(5.7-1+5.3)

=2.7*10

=27

(4)0.625÷0.125*0.8

=(0.625*0.8)*8÷（0.128*8）

=0.5*8÷1

(5)18.6*6.1+3.9*18.6

=18.6*(6.1+3.9)

=18.6*10

=186

(6)1.3579+3.5791+5.7913+7.9135+9.1357

=(1+3+5+7+9)*1.1111

=25*1.1111

=27.7775

(7)52.5x2.9+5.45

=5.25x29+5.25+0.2

=5.25*(29+1)+0.2

=5.25*30+0.2

=157.5+0.3

=157.7

(8)0.92x15+0.08x15

=(0.92+0.08)*15

=1*15

=15

(9)0.72*1.25*2.5

=0.9*(0.8*1.25)*2.5

=0.9*1*2.5

=2.25

(10)400.6x7-2003x0.4

=200.3x14-200.3x4

=200.3*(14-4)

=200.3*10

=2003

四年级下册一位小数乘法脱式简便计算二十题

5.3*6.3+2.3= 4.4*7.3+5.3=

4*8.8+1.5= 4.1*0.8-0.2=

9.9*1.4+0.6= 6.4*2.4+3.6=

12.48-4*9.7= 9.8*1.3-0.3=

4.8*9.1-0.5=

4.2*1.8-0.1=

5.59-3*4.3=

3.053-0.1*5.3=

9.4*8.4+5.8=

6.908-1.3*1.6=

13.596-9.1*5.6=

11.259-2.1*7.9=

7.3+3.8*2.3=

9.3+6.1*4.8=

8.7*0.1-0.1=

8.6*8.9+8=

4.584-2.1*0.4=

7.7*9.9+7.7=

0.3+2.8*3.5=

2.9*8.2+9.2=

2.9+0.6*7.5=

60道小数乘除法算式

5.6*2.93.77*1.80.02*965.22*0.39.99*0.024.67*0.95*2.441.666*6.19.432*0.0025.6*6.54.88*2.95.61*4.38.9*2.45.5*559.77*0.021.384*5.18.78*832.6*610.059*0.24.268*1.757*5.79.46*2.8517.8*6.41.5*4.92.5*0.885.555*5.22.22*3.337.658*8536.02*0.356.78*8除法：85.44÷1642.84÷7101.7÷967.5÷15230.4÷621.24÷360.736÷2343.5÷1235.21÷739.6÷246.21÷0.03210÷1.451.3÷0.2791.2÷3.80.756÷0.180.66÷0.311.97÷1.569.6÷2.938.4÷0.815÷0.06（循环小数的用简便方法e799bee5baa6e997aee7ad94e58685e5aeb931333335306231，除不尽保留2位小数）：8.2÷0.120.8÷0.976.4÷5.44.7÷31.25÷1.232÷4214.36÷2.78.33÷6.21.7÷0.032.41÷0.7用竖式计算0.396÷1.2= 0.756÷0.36= 15.6*13=0.18*15= 0.025*14= 3.06*36=0.04*0.12= 3.84*2.6≈ 5.76*3= （保留一位小数）7.15*22 90.75÷3.3 3.68*0.2516.9÷0.13 1.55÷3.9 3.7*0.01613.76*0.8= 5.2*0.6 8.4*1.36.4*0.5 4.48*0.4 5.25*535.4*4.2 0.042*0.54 0.76*0.320.25*0.046 2.52*3.4 1.08*25 0.12*0.5*0.16= 4.8*0.25= 0.125*1.4≈（保留两位小数）2.5÷0.7= （保留三位小数） 10.1÷3.3= （商用循环小数）10.75÷12.5= （用乘法验算） 3.25*9.04= （用除法验算）3、脱式计算（能简算的要简算）2.5*7.1*4 16.12*99+16.12 5.2*0.9+0.97.28*99+7.28 4.3*50*0.2 64-2.64*0.526*15.7+15.7*24 (2.275 +0.625)*0.28 3.94+34.3*0.2 1.2*(9.6÷2.4)÷4.88.9*1.1*4.7 2.7*5.4*3.9 3.6*9.85-5.46 8.05*3.4+7.6 6.58*4.5*0.9 2.8*0.5+1.5832+4.9-0.9 4.8-4.8*0.5 (1.25-0.125)*84.8*100.1 56.5*99+56.5 7.09*10.8-0.8*7.094.85 + 0.35 ÷ 1.4 8.7 * 17.4 - 8.7 * 7.412.5*0.4*2.5*8 0.87*3.16+4.64 9.5*101 0.68 ÷（5.2 -3.5）* 1.25 40.5 ÷ 0.81 * 0.18 4.8 *(15 ÷ 2.4) 6.81+6.81*99 0.25*185*40 4.4*0.8-3.4*0.8(9.37+9.37+9.37+9.37)* 2.5 2.37*6.3+2.37*3.7 2.5*1.25*0.32 3.8*10.12.5*(3.8*0.04) 7.69*101 3.8*10.10.25*39+0.25 0.125*72 46*0.33+54*0.33(8*5.27) *1.25 6.81+6.81*99 0.25*185*406.8*0.75÷0.5 3.75÷0.125–2.75 1.53+23.4÷7.29.5*99 13.5*0.98 12.5*8.8