题目内容
细心算一算
(1)(-8)+6+(-13)+(-6)
(2)(-5
)-2
+(-
)-(-3)
(3)-18÷(-3)2-3×(-2)3
(4)-14-[(1-
)×(-
)-(-1
)]÷(-
)
(5)(-1)×
×
×(-
)×0×(-8)
(6)(
-
-
+
)×48.
(1)(-8)+6+(-13)+(-6)
(2)(-5
| 5 |
| 6 |
| 1 |
| 6 |
| 1 |
| 2 |
(3)-18÷(-3)2-3×(-2)3
(4)-14-[(1-
| 1 |
| 2 |
| 5 |
| 6 |
| 1 |
| 9 |
| 1 |
| 24 |
(5)(-1)×
| 3 |
| 5 |
| 1 |
| 6 |
| 2 |
| 3 |
(6)(
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 8 |
| 5 |
| 24 |
考点:有理数的混合运算
专题:
分析:(1)(2)先化简,在分类计算即可;
(3)先算乘方,再算乘除,最后算减法;
(4)先算乘方和括号里面的运算,再算除法,最后算减法;
(5)利用0乘任何数都得0计算即可;
(6)利用乘法分配律简算.
(3)先算乘方,再算乘除,最后算减法;
(4)先算乘方和括号里面的运算,再算除法,最后算减法;
(5)利用0乘任何数都得0计算即可;
(6)利用乘法分配律简算.
解答:解:(1)原式=-8+6-13-6
=-21;
(2)原式=-5
-2
-
+3
=-5
;
(3)原式=-18÷9-3×(-8)
=-2+24
=22;
(4)原式=-1-[
×(-
)+1
]÷(-
)
=-1-[-
+1
]÷(-
)
=-1-
×(-24)
=-1+
=
;
(5)原式=0;
(6)原式=
×48-
×48-
×48+
×48
=32-12-18+10
=12.
=-21;
(2)原式=-5
| 5 |
| 6 |
| 1 |
| 6 |
| 1 |
| 2 |
=-5
| 1 |
| 2 |
(3)原式=-18÷9-3×(-8)
=-2+24
=22;
(4)原式=-1-[
| 1 |
| 2 |
| 5 |
| 6 |
| 1 |
| 9 |
| 1 |
| 24 |
=-1-[-
| 5 |
| 12 |
| 1 |
| 9 |
| 1 |
| 24 |
=-1-
| 25 |
| 36 |
=-1+
| 50 |
| 3 |
=
| 47 |
| 3 |
(5)原式=0;
(6)原式=
| 2 |
| 3 |
| 1 |
| 4 |
| 3 |
| 8 |
| 5 |
| 24 |
=32-12-18+10
=12.
点评:此题考查有理数的混合运算,掌握运算顺序,正确判定运算符号计算即可.
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