题目内容
计算下列各式:
(1)(-3)2÷2
÷(-
)+4+22×(-
)
(2)-0.25÷(-
)2×(-1)3+(
+
-3.75)×24.
(1)(-3)2÷2
| 1 |
| 4 |
| 2 |
| 3 |
| 3 |
| 2 |
(2)-0.25÷(-
| 1 |
| 2 |
| 11 |
| 8 |
| 7 |
| 3 |
(1)9×
×(-
)+4+4×(-
),
=-6+4-6,
=-12+4,
=-8;
(2)-0.25÷(-
)2×(-1)3+(
+
-3.75)×24,
=-
×4×(-1)+
×24+
×24-
×24,
=1+33+56-90,
=90-90,
=0.
| 4 |
| 9 |
| 3 |
| 2 |
| 3 |
| 2 |
=-6+4-6,
=-12+4,
=-8;
(2)-0.25÷(-
| 1 |
| 2 |
| 11 |
| 8 |
| 7 |
| 3 |
=-
| 1 |
| 4 |
| 11 |
| 8 |
| 7 |
| 3 |
| 15 |
| 4 |
=1+33+56-90,
=90-90,
=0.
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