分数混合运算和简便计算
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5/9X(9/5+18)
=5/9×9/5+5/9×18
=1+10
=11
5/9X5/6+4/9÷6/5
=5/9×5/6+4/9×5/6
=(5/9+4/9)×5/6
=1×5/6
=5/6
13/14-15/28÷5/8
=13/14-15/28×8/5
=13/14-3/7×2
=13/14-6/7
= 1/14
4÷4/5-4/5÷4
=4×5/4-4/5×1/4
=5+1/5
=5又1/5
(5/6-3/4)÷3/8
=(5/6-3/4)×8/3
=5/6×8/3-3/4×8/3
=20/9-2
=2/9
7/11÷[2/5-(1-7/10)}
=7/11÷[2/5-3/10]
=7/11÷1/10
=70/11
=5/9×9/5+5/9×18
=1+10
=11
5/9X5/6+4/9÷6/5
=5/9×5/6+4/9×5/6
=(5/9+4/9)×5/6
=1×5/6
=5/6
13/14-15/28÷5/8
=13/14-15/28×8/5
=13/14-3/7×2
=13/14-6/7
= 1/14
4÷4/5-4/5÷4
=4×5/4-4/5×1/4
=5+1/5
=5又1/5
(5/6-3/4)÷3/8
=(5/6-3/4)×8/3
=5/6×8/3-3/4×8/3
=20/9-2
=2/9
7/11÷[2/5-(1-7/10)}
=7/11÷[2/5-3/10]
=7/11÷1/10
=70/11
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