我会列式计算.
①30的
减去13所得的差再除以
,商是多少?
②8比一个数的20%少2,求这个数.(用方程解)
人气:127 ℃ 时间:2020-05-12 06:19:19
解答
①(30×56-13)÷34,=(25-13)÷34,=12÷34,=16;答:商是16.②设这个数是x,由题意得: 20%x-2=8, 20%x-2+2=8+2, 20%x=10,20%x÷20%=10÷20%, &nbs...
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