1.列方程,設(shè)乙數(shù)為x,則甲數(shù)為80%x
x+80%x=360
1.8x=360
x=200
所以乙數(shù)為300
2不列方程
1-20%=80%
1+80%=1.8
360÷1.8=200
甲數(shù)比乙數(shù)少20%,甲乙兩數(shù)之和是360,乙數(shù)是多少
甲數(shù)比乙數(shù)少20%,甲乙兩數(shù)之和是360,乙數(shù)是多少
數(shù)學(xué)人氣：346 ℃時(shí)間：2020-02-02 23:00:56
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