题目内容
计算题:
(1)2-5+4-(-7)+(-6)
(2)(-1
)÷0.8×(-
)
(3)(2
-4
-1
)×(-
)
(4)-22×(-
)+8÷(-2)2
(5)-12+|-8|÷(3-5)-(-2)3.
(1)2-5+4-(-7)+(-6)
(2)(-1
| 1 |
| 3 |
| 6 |
| 7 |
(3)(2
| 1 |
| 4 |
| 1 |
| 2 |
| 1 |
| 8 |
| 8 |
| 9 |
(4)-22×(-
| 1 |
| 2 |
(5)-12+|-8|÷(3-5)-(-2)3.
(1)原式=2-5+4+7-6
=-3+4+7-6
=1+7-6
=2;
(2)原式=(-
)÷
×(-
)
=(-
)×
×(-
)
=(-
)×(-
)
=
;
(3)原式=(
-
-
)×(-
)
=
×(-
)-
×(-
)-
×(-
)
=-2+4+1
=3;
(4)原式=-4×(-
)+8×
=2+2
=4;
(5)原式=-1+8÷(-2)+8
=-1-4+8
=5.
=-3+4+7-6
=1+7-6
=2;
(2)原式=(-
| 5 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
=(-
| 5 |
| 3 |
| 5 |
| 4 |
| 6 |
| 7 |
=(-
| 25 |
| 12 |
| 6 |
| 7 |
=
| 25 |
| 14 |
(3)原式=(
| 9 |
| 4 |
| 9 |
| 2 |
| 9 |
| 8 |
| 8 |
| 9 |
=
| 9 |
| 4 |
| 8 |
| 9 |
| 9 |
| 2 |
| 8 |
| 9 |
| 9 |
| 8 |
| 8 |
| 9 |
=-2+4+1
=3;
(4)原式=-4×(-
| 1 |
| 2 |
| 1 |
| 4 |
=2+2
=4;
(5)原式=-1+8÷(-2)+8
=-1-4+8
=5.
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