题目内容
计算下列各题:
(1)(+10
)+(-11.5)+(-10
)-(+4.5)
(2)(-81)÷
×
÷(-16)
(3)-32-[-5-0.2÷
×(-2)2]
(4)24×(
-
-
)+(-
)2÷(-
)
(5)(-2.5)÷3÷(-
)×(-22)
(6)-2•(-
)2+|-(-2)|3-(-
).
(1)(+10
| 1 |
| 3 |
| 1 |
| 3 |
(2)(-81)÷
| 9 |
| 4 |
| 4 |
| 9 |
(3)-32-[-5-0.2÷
| 4 |
| 5 |
(4)24×(
| 1 |
| 6 |
| 3 |
| 4 |
| 5 |
| 8 |
| 1 |
| 3 |
| 1 |
| 72 |
(5)(-2.5)÷3÷(-
| 1 |
| 6 |
(6)-2•(-
| 1 |
| 2 |
| 1 |
| 2 |
(1)原式=(+10
)+(-10
)+(-11.5)-(+4.5),
=0+(-16),
=-16;
(2)原式=-16÷(-16),
=1;
(3)原式=-9-[-5-1]
=-9+6
=-3;
(4)原式=24×
-24×
-24×
+
×(-72),
=4-18-15+(-8),
=-37;
(5)-2.5×
×(-6)×(-4),
=20;
(6)原式=-2×
+8+
,
=8.
| 1 |
| 3 |
| 1 |
| 3 |
=0+(-16),
=-16;
(2)原式=-16÷(-16),
=1;
(3)原式=-9-[-5-1]
=-9+6
=-3;
(4)原式=24×
| 1 |
| 6 |
| 3 |
| 4 |
| 5 |
| 8 |
| 1 |
| 9 |
=4-18-15+(-8),
=-37;
(5)-2.5×
| 1 |
| 3 |
=20;
(6)原式=-2×
| 1 |
| 4 |
| 1 |
| 2 |
=8.
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