题目内容
脱式计算.
(736+164)×9 | 800-300÷5 | 175+25×4 |
125×8×8 | 495+205×4 | 607-26×3 |
解:(1)(736+164)×9,
=900×9,
=8100;
(2)800-300÷5,
=800-60,
=740;
(3)175+25×4,
=175+100,
=275;
(4)125×8×8,
=(125×8)×8,
=1000×8,
=8000;
(5)495+205×4,
=495+820,
=1315;
(6)607-26×3,
=607-78,
=529;
分析:(1)先算括号里的加法,再算乘法,
(2)先算除法,再算减法,
(3)先算乘法,再算加法,
(4)运用乘法结合律进行简算,
(5)先算乘法,再算加法,
(6)先算乘法,再算减法.
点评:考查了整数四则混合运算顺序.
=900×9,
=8100;
(2)800-300÷5,
=800-60,
=740;
(3)175+25×4,
=175+100,
=275;
(4)125×8×8,
=(125×8)×8,
=1000×8,
=8000;
(5)495+205×4,
=495+820,
=1315;
(6)607-26×3,
=607-78,
=529;
分析:(1)先算括号里的加法,再算乘法,
(2)先算除法,再算减法,
(3)先算乘法,再算加法,
(4)运用乘法结合律进行简算,
(5)先算乘法,再算加法,
(6)先算乘法,再算减法.
点评:考查了整数四则混合运算顺序.
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