题目内容
写出计算过程和结果(1)(-
| 2 |
| 3 |
| 5 |
| 9 |
| 7 |
| 12 |
(2)-102+3×(-2)4-65÷(-13);
(3)3+50÷(-2)2×(-
| 1 |
| 5 |
(4)100÷(-2)2-(-27)×(-
| 1 |
| 3 |
分析:(1)首先利用乘法分配律打开括号,然后计算加减即可求解;
(2)(3)(4)首先计算乘方,然后计算乘除,接着计算解决即可求解;
(2)(3)(4)首先计算乘方,然后计算乘除,接着计算解决即可求解;
解答:解:(1)(-
-
+
)×(-36)
=
×36+
×36-
×36
=24+20-21
=23;
(2)-102+3×(-2)4-65÷(-13)
=-100+48+5
=-47;
(3)3+50÷(-2)2×(-
)-1
=3-50×
×
-1
=-
;
(4)100÷(-2)2-(-27)×(-
)2+(-2)3
=100÷4+27×
-8
=25+3-8
=20.
| 2 |
| 3 |
| 5 |
| 9 |
| 7 |
| 12 |
=
| 2 |
| 3 |
| 5 |
| 9 |
| 7 |
| 12 |
=24+20-21
=23;
(2)-102+3×(-2)4-65÷(-13)
=-100+48+5
=-47;
(3)3+50÷(-2)2×(-
| 1 |
| 5 |
=3-50×
| 1 |
| 4 |
| 1 |
| 5 |
=-
| 1 |
| 2 |
(4)100÷(-2)2-(-27)×(-
| 1 |
| 3 |
=100÷4+27×
| 1 |
| 9 |
=25+3-8
=20.
点评:此题主要考查了有理数的混合运算法则:首先计算括号内面的,然后计算乘除,接着计算加减即可.
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