能简算的要简算(1)5分之4 *7分之2除以7分之6*6分之5(2)7分之1*12分之5+12分之5除以5分之7

2024-11-16 10:28:45
推荐回答(2个)
回答1:

1. 4/5×2/7÷6/7×5/6
=4/5×2/7×7/6×5/6
=2/9 (约分整理可得,要细心)
2. 1/7×5/12 +5/12÷7/5
= 1/7×5/12 +5/12×5/7
=5/12×(1/7 +5/7)
=5/12×6/7
=5/14
3. 2/3+5/8 ×3/5 ÷9/8
=2/3 +3/8×8/9
=2/3+1/3
=1
4. [(3/5 -1/3)÷4/5]÷12.5%
=(3/5 -1/3)÷(4/5×12.5%)
=[(3/5 -1/3)÷1/10
=4/15×10
=8/3

回答2:

等于三分之二加八分之三乘九分之八等于三分之二加三分之一等于一