题目内容
计算:
(1)(-7)+(-2)
(2)(-3)+(-4)-(+11)-(-19)
(3)-14+8÷(-2)2-(-4)×(-3)
(4)25×
-(-25)×
+25×(-
)
(1)(-7)+(-2)
(2)(-3)+(-4)-(+11)-(-19)
(3)-14+8÷(-2)2-(-4)×(-3)
(4)25×
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
(1)原式=-9;
(2)原式=-3-4-11+19
=-18+19
=1;
(3)原式=-1+8÷4-12
=-1+2-12
=-11;
(4)原式=25×
+25×
+25×(-
)
=25(
+
-
)
=25
(2)原式=-3-4-11+19
=-18+19
=1;
(3)原式=-1+8÷4-12
=-1+2-12
=-11;
(4)原式=25×
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
=25(
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
=25
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