题目内容
脱式计算 3.6+2.9-2.8 |
18.5-4.9+3.5 |
15×4-25 |
250÷5+180. |
分析:(1)(2)按照从左到右的顺序计算;
(3)先算乘法再算减法;
(4)先算除法,再算加法.
(3)先算乘法再算减法;
(4)先算除法,再算加法.
解答:解:(1)3.6+2.9-2.8,
=6.5-2.8,
=3.7;
(2)18.5-4.9+3.5,
=13.6+3.5,
=17.1;
(3)15×4-25,
=60-25,
=35;
(4)250÷5+180,
=50+180,
=230.
=6.5-2.8,
=3.7;
(2)18.5-4.9+3.5,
=13.6+3.5,
=17.1;
(3)15×4-25,
=60-25,
=35;
(4)250÷5+180,
=50+180,
=230.
点评:本题考查了简单的小数和整数的四则混合运算,关键是理清楚计算的顺序,按照计算顺序逐步求解即可.
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