题目内容
脱式计算. (336-87)×18 |
(50+59)×48 | 37×(248-42) |
12×(702-188) | 208×30+67 | 50-50÷5+6. |
分析:(1)(2)(3)(4)先算括号内的,再算括号外的;
(5)先算乘法,再算加法;
(6)先算除法,再算减法和加法.
(5)先算乘法,再算加法;
(6)先算除法,再算减法和加法.
解答:解:(1)(336-87)×18,
=249×18,
=4482;
(2)(50+59)×48,
=109×48,
=5232;
(3)37×(248-42),
=37×206,
=7622;
(4)12×(702-188),
=12×514,
=6168;
(5)208×30+67,
=6240+67,
=6307;
(6)50-50÷5+6,
=50-10+6,
=46.
=249×18,
=4482;
(2)(50+59)×48,
=109×48,
=5232;
(3)37×(248-42),
=37×206,
=7622;
(4)12×(702-188),
=12×514,
=6168;
(5)208×30+67,
=6240+67,
=6307;
(6)50-50÷5+6,
=50-10+6,
=46.
点评:脱式计算,特别应注意运算顺序以及运算法则.
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