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数学
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把99拆成4个数,使得第一个数加2,第二个数减2,第三个数乘2,第四个数除以2,得到的结果都相等,你觉得应该怎样拆?
人气:228 ℃ 时间:2019-10-19 04:51:57
解答
设相等的数为x,则其余数为(x-2),(x+2),
x
2
,2x,
由题意得:(x-2)+(x+2)+
x
2
+2x=99,
解得:x=22,
则x-2=20,x+2=24,
x
2
=11,2x=44,
故应该将99拆为20,24,11,44这4个数.
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