Question

用简便算法计算下面各题

3分之2X4分之1X3 （9分之8+27分之4）X27 87X86分之3

Answer 1

3分之2X4分之1X3
=（2/3×3）×1/4
=2×1/4
=1/2

（9分之8+27分之4）X27
=8/9×27+4/27×27
=24+4
=28

87X86分之3

=（86+1）×3/86
=86×3/86+3/86
=3+3/86
=3又3/86

Answer 2

5/9*(9/5+18)
解：原式=1+10
=11

13/14-15/28÷5/8
解：原式=13/14-15/28*8/5
=13/14-6/7
=13/14-12/14
=1/14

(5/6-3/4)÷3/8
解：原式=(10/12-9/12)÷3/8
=1/12÷3/8
=2\9

5/9*5/6+4/9÷6/5
解：原式=25/54+20/54
=45/54
=5/6

4÷4/5-4/5÷4
解：原式=4*5/4-4/5*1/4
=5-1/5
=24/5

7/11÷[2/5-(1-7/10)]
解：原式=7/11÷(2/5-3/10)
=7/11÷(4/10-3/10)
=7/11÷1/10
=7/11*10
=70/11

这是过程及答案，希望能给你帮助！