题目内容
805÷23×28 | (324-118)×15 | 284+26×103 |
900÷(288÷16) | (502-298)÷12 | 125×16÷25. |
分析:(1)按照从左到右的顺序计算;
(2)先算小括号里面的减法,再算括号外的乘法;
(3)先算乘法,再算加法;
(4)先算小括号里面的除法,再算括号外的除法;
(5)先算小括号里面的减法,再算括号外的除法;
(6)按照从左到右的顺序计算.
(2)先算小括号里面的减法,再算括号外的乘法;
(3)先算乘法,再算加法;
(4)先算小括号里面的除法,再算括号外的除法;
(5)先算小括号里面的减法,再算括号外的除法;
(6)按照从左到右的顺序计算.
解答:解:(1)805÷23×28,
=35×28,
=980;
(2)(324-118)×15,
=206×15,
=3090;
(3)284+26×103,
=284+2678,
=2962;
(4)900÷(288÷16),
=900÷18,
=50;
(5)(502-298)÷12,
=204÷12,
=17;
(6)125×16÷25,
=2000÷25,
=80.
=35×28,
=980;
(2)(324-118)×15,
=206×15,
=3090;
(3)284+26×103,
=284+2678,
=2962;
(4)900÷(288÷16),
=900÷18,
=50;
(5)(502-298)÷12,
=204÷12,
=17;
(6)125×16÷25,
=2000÷25,
=80.
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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