题目内容

脱式计算:
576÷3÷4 81×7÷9 201+232-365
399÷7+294 672÷(2×3) (601-246)÷5
分析:(1)(2)(3)按照从左到右的顺序计算;
(4)先算除法,再算加法;
(5)先算小括号里面的乘法,再算括号外的除法;
(6)先算小括号里面的减法,再算括号外的除法.
解答:解:(1)576÷3÷4,
=192÷4,
=48,

(2)81×7÷9,
=567÷9,
=63;

(3)201+232-365,
=433-365,
=68;

(4)399÷7+294,
=57+294,
=351;

(5)672÷(2×3),
=672÷6,
=112;

(6)(601-246)÷5,
=355÷5,
=71.
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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