看誰答得快
16×
3
4
=
12
12

2
9
×4
=
8
9
8
9

3
4
=
3
3

3
11
×3
=
9
11
9
11
1
2
×
1
3
=
1
6
1
6
3
8
×3
=
9
8
9
8
1
18
=
1
3
1
3
6
7
×
1
12
=
1
14
1
14
分析:分?jǐn)?shù)乘整數(shù):分子與整數(shù)相乘的積做分子,分母不變,能約分的先約分.
解答:解:
16×
3
4
=12

2
9
×4
=
8
9

3
4
=3

3
11
×3
=
9
11
1
2
×
1
3
=
1
6
3
8
×3
=
9
8
1
18
=
1
3
6
7
×
1
12
=
1
14
故答案為:12,
8
9
,3,
9
11
1
6
,
9
8
,
1
3
,
1
14
點(diǎn)評:本題考查了分?jǐn)?shù)乘法的計(jì)算,計(jì)算時(shí)要細(xì)心,注意把結(jié)果化成最簡分?jǐn)?shù).
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