题目内容
计算:
(1)-12+13-(9-18)
(2)5
-[2
+(-4.8)-(-4
)]
(3)5+3×(-2)3+33
(4)30÷(
-
)
(1)-12+13-(9-18)
(2)5
| 1 |
| 5 |
| 1 |
| 6 |
| 5 |
| 6 |
(3)5+3×(-2)3+33
(4)30÷(
| 1 |
| 5 |
| 1 |
| 6 |
(1)-12+13-(9-18)
=-12+13-(-9)
=-12+13+9
=-12+22
=10;
(2)5
-[2
+(-4.8)-(-4
)]
=5
-(2
-4.8+4
)
=5
-7+4.8
=10-7
=3;
(3)5+3×(-2)3+33
=5+3×(-8)+27
=5-24+27
=32-24
=8;
(4)30÷(
-
)
=30÷
=30×30
=900.
=-12+13-(-9)
=-12+13+9
=-12+22
=10;
(2)5
| 1 |
| 5 |
| 1 |
| 6 |
| 5 |
| 6 |
=5
| 1 |
| 5 |
| 1 |
| 6 |
| 5 |
| 6 |
=5
| 1 |
| 5 |
=10-7
=3;
(3)5+3×(-2)3+33
=5+3×(-8)+27
=5-24+27
=32-24
=8;
(4)30÷(
| 1 |
| 5 |
| 1 |
| 6 |
=30÷
| 1 |
| 30 |
=30×30
=900.
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