题目内容
混合运算 2×36+20= | 190-30×5= | 90+5×60= |
56÷7×8= | 12+80÷10= | 125÷25-4= |
考点:整数四则混合运算
专题:运算顺序及法则
分析:(1)(3)先算乘法,再算加法;
(2)先算乘法,再算减法;
(4)按照从左到右的顺序计算;
(5)先算除法,再算加法;
(6)先算除法,再算减法.
(2)先算乘法,再算减法;
(4)按照从左到右的顺序计算;
(5)先算除法,再算加法;
(6)先算除法,再算减法.
解答:
解:(1)2×36+20
=72+20
=92;
(2)190-30×5
=190-150
=40;
(3)90+5×60
=90+300
=390;
(4)56÷7×8
=8×8
=64;
(5)12+80÷10
=12+8
=20;
(6)125÷25-4
=5-4
=1.
=72+20
=92;
(2)190-30×5
=190-150
=40;
(3)90+5×60
=90+300
=390;
(4)56÷7×8
=8×8
=64;
(5)12+80÷10
=12+8
=20;
(6)125÷25-4
=5-4
=1.
点评:本题考查了简单的四则混合运算,计算时先理清楚运算顺序,根据运算顺序逐步求解即可.
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