数学题:甲、乙、丙、丁四人共植树60棵
- 时间:2020-05-13 15:05:48
- 分类:数学世界
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数学题:甲、乙、丙、丁四人共植树60棵。甲植树的棵数是其余三人的二分之一,乙植树的棵数是其余三人的三分之一,丙植树的棵数是其余三人的四分之一,丁植树多少棵?
数学题解答:
由“甲植树的棵数是其余三人的二分之一”,可以把甲植树棵数看成1份,而其余三人合起来是2份。这样便可以算出甲植树棵数占四人的几分之几?1÷(1+2)=1/3。
同样道理,乙、丙植树棵数分别占四人总数的几分之几,也可以这样算出来。1÷(1+3)=1/4,1÷(1+4)=1/5
最后算出丁植树棵数占四人总数的几分之几?1 – 1/3 – 1/4 -1/5 = 13/60
丁植树的棵数:60× 13/60 = 13(棵)
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