六年级上册数学补充习题第85页答案
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5: 360÷(1-10%)=400(元)
6: (23+22)÷30%
= 45÷30%
= 150(人)
7:
(1)解:设桃树有x棵,苹果树有3/5x棵。
x+3/5x = 240
x = 150
3/5x = 3/5×150 = 90(棵)
(2)解:设桃树有x棵,苹果树有3/5x棵。
x - 3/5x = 240
x =600
3/5x = 3/5×600 = 360(棵)
8:解:设刘阿姨家养的母鸡有x只,公鸡有2/5x只。
x - 2/5x = 60
x = 100
2/5x = 2/5×100 = 40(只)
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