Question

43X8分之3+18X0.375+19X37.5%简便计算

还有2又7分之5-0.38-1.62+1又7分之2所有题都要简便计算
4又8分之7-1.63-0.37-15分之8
5.73-{2又2分之1-（0.81+1又5分之2）}
求大侠解救啊55555~

Answer 1

43X8分之3+18X0.375+19X37.5%
=（43+18+19）×3/8
=80×3/8
=30
2又7分之5-0.38-1.62+1又7分之2
=（2又5/7+1又2/7）-（0.38+1.62）
=4-2
=2
4又8分之7-1.63-0.37-15分之8
=4又7/8-8/15-（1.63+0.37）
=4又41/120-2
=2又41/120
5.73-{2又2分之1-（0.81+1又5分之2）}
=5.73-{2.5-2.21}
=5.73-2.5+2.21
=3.23+2.21
=5.44

Answer 2

43X8分之3+18X0.375+19X37.5%
=43×0.375+18×0.375+19×0.375
=0.375×(43+18+19)
=3/8×80
=30

2又7分之5-0.38-1.62+1又7分之2
=(2又7分之5+1又7分之2)-(0.38+1.62)
=4-2
=2

4又8分之7-1.63-0.37-15分之8
=4+7/8-8/15-(1.63+0.37)
=4+(105-64)/120-2
=2+41/120
=2又120分之41

5.73-{2又2分之1-（0.81+1又5分之2）}
=5.73-2又2分之1+0.81+1又5分之2
=5.73-2.5+0.81+1.4
=5.74

Answer 3

43X8分之3+18X0.375+19X37.5%
=0.375x(43+18+19)
=0.375x8
=3

2又7分之5-0.38-1.62+1又7分之2
=2又7分之5+1又7分之2-0.38-1.62
=4-2
=2

4又8分之7-1.63-0.37-15分之8
=4又8分之7-2-15分之8
=2又120分之105-120分之64
=2又120分之41

5.73-{2又2分之1-（0.81+1又5分之2）}
=5.73-2.2+0.81+1.4
=5.74

Answer 4

1、8分之3化为小数就是0.375 所以有（43+18+19）*0.375=30
2、（2又7分之5+1+1又7分之2）-（0.38+1.62）=4-2=2
3、这题没法简化 是8分之15就好了
4、5.73-（2.5-0.81-1.4）=5.73-2.5+0.81+1.4=5.44

Answer 5

原式=（43+18+19）X0.375=80x八分之三=3