5
6
×8=
5
6×8
=
5
48
×
×
.(判斷對錯)
分析:分數(shù)乘整數(shù)的方法:分母不變,分子和整數(shù)相乘的積做分子,能約分的要先約分再計算.
解答:解:
5
6
×8=
5×8
6
=
40
6
=
20
3

故答案為:×.
點評:此題考查分數(shù)乘整數(shù)的計算方法的靈活運用,要記住:是分母不變,分子和整數(shù)相乘的積做分子,而不是分子不變,分母和整數(shù)相乘的積做分母.
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