题目内容
脱式计算
20×30÷6 | 30×6+25 | 100-70÷7 | 474÷(2×3) |
分析:(1)按照从左到右的顺序计算;
(2)先算乘法,再算加法;
(3)先算除法,再算减法;
(4)先算小括号里面的乘法,再算括号外的除法.
(2)先算乘法,再算加法;
(3)先算除法,再算减法;
(4)先算小括号里面的乘法,再算括号外的除法.
解答:解:(1)20×30÷6,
=600÷6,
=100;
(2)30×6+25,
=180+25,
=205;
(3)100-70÷7,
=100-10,
=90;
(4)474÷(2×3),
=474÷6,
=79.
=600÷6,
=100;
(2)30×6+25,
=180+25,
=205;
(3)100-70÷7,
=100-10,
=90;
(4)474÷(2×3),
=474÷6,
=79.
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.
练习册系列答案
相关题目