题目内容
脱式计算.
(238+164)×9 | 800-300÷6 | 361+25×4 | 25×4×8. |
分析:(1)先算小括号里面的加法,再算括号外的乘法;
(2)先算除法,再算减法;
(3)先算乘法,再算加法;
(4)按照从左到右的顺序计算.
(2)先算除法,再算减法;
(3)先算乘法,再算加法;
(4)按照从左到右的顺序计算.
解答:解:(1)(238+164)×9,
=402×9,
=3618;
(2)800-300÷6,
=800-50,
=750;
(3)361+25×4,
=361+100,
=461;
(4)25×4×8,
=100×8,
=800.
=402×9,
=3618;
(2)800-300÷6,
=800-50,
=750;
(3)361+25×4,
=361+100,
=461;
(4)25×4×8,
=100×8,
=800.
点评:本题考查了简单的四则混合运算,关键是理清楚运算的顺序,然后根据运算顺序逐步求解即可.
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