Question

用简便方法计算 12.5乘32乘50 0.125+4又11分之7-1又11分之7+8分之7

50.8乘101-50.8 3.14乘7.3+3.7乘3.14-3.14
1.5除以0.125 4分之9乘6分之5+6分之5乘9分之5

Answer 1

12.5乘32乘50
=12.5×8×4×50
=100×200
=20000

0.125+4又11分之7-1又11分之7+8分之7
=1/8+3+7/8
=4

50.8乘101-50.8
=50.8×（101-1）
=50.8×100
=5080

3.14乘7.3+3.7乘3.14-3.14
=3.14×（7.3+3.7-1）
=3.14×10
=31.4

1.5除以0.125
=1.5÷1/8
=1.5×8
=12

9分之4乘6分之5+6分之5乘9分之5
=5/6×（4/9+5/9）
=5/6×1
=5/6

Answer 2

12.5乘32乘50
=12.5*8*4*50
=100*200
=20000
0.125+4又11分之7-1又11分之7+8分之7

=1/8+7/8+( 4又11分之7-1又11分之7)
=1+3
=4
50.8乘101-50.8
=50.8*(101-1)
=50.8*100

=5080
3.14乘7.3+3.7乘3.14-3.14

=3.14*(7.3+3.7-1)
=3.14*10

=31.4
1.5除以0.125
=(1.5*8）/(0.125*8)
=12/1
=12
4分之9乘6分之5+6分之5乘9分之5

=(9/4+5/9)*5/6
=(101/36)*5/6
=505/216
题目应是
9分之4乘6分之5+6分之5乘9分之5
=(4/9+5/9)*5/6
=1*5/6
=5/6