選B
如果一個數(shù)的一半是30,那么這個數(shù)的四分之三是（?）
設這個數(shù)是 x
則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
數(shù)學人氣：926 ℃時間：2019-10-11 00:51:13
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