一个数的25%比这个数的二分之一少30,这个数是多少?要有算式.
一个数的25%比这个数的二分之一少30,这个数是多少?要有算式.
数学人气:872 ℃时间:2019-11-21 14:41:23
优质解答
30÷(1/2-25%)=120
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