题目内容
混合运算
272+28÷4
25×32+18
336-124÷4
512÷8×23.
272+28÷4
25×32+18
336-124÷4
512÷8×23.
考点:整数四则混合运算
专题:运算顺序及法则
分析:(1)先算除法,再算加法;
(2)先算乘法,再算加法;
(3)先算除法,再算减法;
(4)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)按照从左到右的顺序计算.
解答:
解:(1)272+28÷4
=272+7
=279;
(2)25×32+18
=800+18
=818;
(3)336-124÷4
=336-31
=305;
(4)512÷8×23
=64×23
=1472.
=272+7
=279;
(2)25×32+18
=800+18
=818;
(3)336-124÷4
=336-31
=305;
(4)512÷8×23
=64×23
=1472.
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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