题目内容
计算:
(1)(1
-
)÷(-
)+(-
);
(2)[1-(1-0.5×
)]×[2-(-3)2];
(3)
×(
-
)×
÷
;
(4)-10+8÷(-2)2-(-4)×(-3).
(1)(1
| 3 |
| 4 |
| 7 |
| 12 |
| 7 |
| 8 |
| 8 |
| 3 |
(2)[1-(1-0.5×
| 1 |
| 3 |
(3)
| 11 |
| 5 |
| 1 |
| 3 |
| 1 |
| 2 |
| 3 |
| 11 |
| 5 |
| 4 |
(4)-10+8÷(-2)2-(-4)×(-3).
(1)原式=(1
-
)×(-
)+(-
)=-2+
-
=-4;
(2)原式=(1-
)×(2-9)=-
;
(3)原式=
×(-
)×
×
=-
;
(4)原式=-10+8÷4-12=-10+2-12=-20.
| 3 |
| 4 |
| 7 |
| 12 |
| 8 |
| 7 |
| 8 |
| 3 |
| 2 |
| 3 |
| 8 |
| 3 |
(2)原式=(1-
| 5 |
| 6 |
| 7 |
| 6 |
(3)原式=
| 11 |
| 5 |
| 1 |
| 6 |
| 3 |
| 11 |
| 4 |
| 5 |
| 2 |
| 25 |
(4)原式=-10+8÷4-12=-10+2-12=-20.
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