选B
如果一个数的一半是30,那么这个数的四分之三是(?)
设这个数是 x
则1/2 * x =30
得x= 60
那么3/4 * x =3/4 *60 = 45
lf half of a number is 30,then three-quarters of it is____.A.forty B.forty-five C.sixty D.fifty
lf half of a number is 30,then three-quarters of it is____.A.forty B.forty-five C.sixty D.fifty
数学人气:373 ℃时间:2019-10-11 00:51:13
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