题目内容
计算.
72-12×5 | (38+24)×6 | 45×8÷5 | 215×2+305. |
分析:(1)先算乘法,再算减法;
(2)先算小括号里面的加法,再算括号外的乘法;
(3)按照从左到右的顺序计算;
(4)先算乘法,再算加法.
(2)先算小括号里面的加法,再算括号外的乘法;
(3)按照从左到右的顺序计算;
(4)先算乘法,再算加法.
解答:解:(1)72-12×5,
=72-60,
=12;
(2)(38+24)×6,
=62×6,
=372;
(3)45×8÷5,
=360÷5,
=72;
(4)215×2+305,
=430+305,
=735.
=72-60,
=12;
(2)(38+24)×6,
=62×6,
=372;
(3)45×8÷5,
=360÷5,
=72;
(4)215×2+305,
=430+305,
=735.
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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