Question

直接写得数． 3 4 ×8=	5 7 ×14=	7 12 ×3=
2 9 ×15=	5× 2 15 =	36× 5 9 =
24× 5 12 =	100× 13 25 =	7 8 ×5=
1 6 ×4=	9× 7 12 =	15× 2 15 =

Answer 1

分析：分数乘整数：分子与整数相乘的积做分子，分母不变，能约分的先约分．

解答：解：

3 4 ×8=6	5 7 ×14=10	7 12 ×3= 7 4
2 9 ×15= 10 3	5× 2 15 = 2 3	36× 5 9 =20
24× 5 12 =10	100× 13 25 =52	7 8 ×5= 35 8
1 6 ×4= 2 3	9× 7 12 = 21 4	15× 2 15 =2

点评：本题考查了简单的分数乘法的计算，计算时要细心，注意把结果化成最简分数．