8
21
×
7
16
=
3
4
÷6=
分析:(1)此題通過約分即可得出結(jié)果;
(2)把除法改為乘法,除以一個(gè)數(shù)等于乘這個(gè)數(shù)的倒數(shù),約分得出結(jié)果.
解答:解:(1)
8
21
×
7
16
=
1
6
;

(2)
3
4
÷6=
3
4
×
1
6
=
1
8
點(diǎn)評(píng):此題主要考查通過約分使計(jì)算簡(jiǎn)算,得出結(jié)果.
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