题目内容
计算下面各题 135×(270-262) |
23×9-17 |
95×8-168 |
(1000-80)×5 | 66×3×9 | 956-75×5. |
考点:整数四则混合运算
专题:运算顺序及法则
分析:(1)先算小括号里面的减法,再算括号外的乘法;
(2)(3)(6)先算乘法,再算减法;
(4)先算小括号里面的减法,再算括号外的乘法;
(5)按照从左到右的顺序计算.
(2)(3)(6)先算乘法,再算减法;
(4)先算小括号里面的减法,再算括号外的乘法;
(5)按照从左到右的顺序计算.
解答:
解:(1)135×(270-262)
=135×8
=1080;
(2)23×9-17
=207-17
=190;
(3)95×8-168
=760-168
=592;
(4)(1000-80)×5
=920×5
=4600;
(5)66×3×9
=198×9
=1782;
(6)956-75×5
=956-375
=581.
=135×8
=1080;
(2)23×9-17
=207-17
=190;
(3)95×8-168
=760-168
=592;
(4)(1000-80)×5
=920×5
=4600;
(5)66×3×9
=198×9
=1782;
(6)956-75×5
=956-375
=581.
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.
练习册系列答案
相关题目