【題目】用簡便方法計算
8.37﹣3.25﹣(1.37+2.25)
3.375÷5﹣×
9÷13+13÷9+11÷13+14÷9+6÷13
9966×6+6678×18
3762÷38+82917÷83
【答案】1.5;;5;180000;1;1098.
【解析】
試題分析:(1)變形為(8.37﹣1.37)﹣(3.25+2.25)再計算;
(2)將除法變?yōu)槌朔ǎ俑鶕?jù)乘法分配律計算;
(3)先計算除法,再算同分母加法,最后相加即可求解;
(4)先變形為3322×18+6678×18,再根據(jù)乘法分配律計算;
(5)將分母變形為2014+2012×2014﹣1,再根據(jù)乘法分配律計算,最后約分計算即可;
(6)先變形為(3800﹣38)÷38+(83000﹣83)÷83,再根據(jù)分配律計算.
解答:解:(1)8.37﹣3.25﹣(1.37+2.25)
=(8.37﹣1.37)﹣(3.25+2.25)
=7﹣5.5
=1.5;
(2)3.375÷5﹣×
=3×﹣×
=(3﹣)×
=3×
=;
(3)9÷13+13÷9+11÷13+14÷9+6÷13
=++++
=(++)+(+)
=2+3
=5;
(4)9966×6+6678×18
=3322×18+6678×18
=(3322+6678)×18
=10000×18
=180000;
(5)
=
=
=1;
(6)3762÷38+82917÷83
=(3800﹣38)÷38+(83000﹣83)÷83
=100﹣1+1000﹣1
=1098.
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