直接寫出得數(shù):
3
4
×16=
4
5
×
5
4
=
16
17
÷8=
9
7
=
1
7
÷
1
14
=
13
9
÷1=
2
3
÷
2
3
×
2
3
=
5
6
+
1
6
×
3
4
=
分析:①②約分計(jì)算;③④⑤把除法改為乘法,再計(jì)算;⑥一個(gè)數(shù)除以1仍得這個(gè)數(shù);⑦從左往右依次計(jì)算;⑧先算乘法,再算加法.
解答:
解:
3
4
×16=12
4
5
×
5
4
=1
16
17
÷8=
2
17
9
7
=
7
9
1
7
÷
1
14
=2
13
9
÷1=
13
9
2
3
÷
2
3
×
2
3
=
2
3
5
6
+
1
6
×
3
4
=
23
24
點(diǎn)評(píng):此題考查了分?jǐn)?shù)的乘法,根據(jù)各自特點(diǎn),靈活解答.
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