题目内容

【题目】脱式计算

①7.2×0.8+1.04

②6.83×7.5+6.83×2.5

③1.08×0.88÷0.27

④2.05÷0.82+33.6.

【答案】7.8;68.3;3.52;36.1

【解析】

试题分析:①首先计算乘法,然后计算加法;

②根据乘法分配律,计算即可;

③首先计算乘法,然后计算除法;

④首先计算除法,然后计算加法.

解:①7.2×0.8+1.04

=5.76+1.04

=7.8

②6.83×7.5+6.83×2.5

=6.83×(7.5+2.5)

=6.83×10

=68.3

③1.08×0.88÷0.27

=0.9504÷0.27

=3.52

④2.05÷0.82+33.6

=2.5+33.6

=36.1

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