题目内容
【题目】脱式计算.
3.76+6.31﹣2.12
2.05×6.37+2.1
2.3+3.29×1.8
4.05×2.2﹣3.1.
【答案】(1)7.95;
(2)15.1585;
(3)8.222;
(4)5.81.
【解析】
试题分析:(1)按照从左向右的顺序进行计算;
(2)先算乘法,再算加法;
(3)先算乘法,再算加法;
(4)先算乘法,再算减法.
解:(1)3.76+6.31﹣2.12
=10.07﹣2.12
=7.95;
(2)2.05×6.37+2.1
=13.0585+2.1
=15.1585;
(3)2.3+3.29×1.8
=2.3+5.922
=8.222;
(4)4.05×2.2﹣3.1
=8.91﹣3.1
=5.81.
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