题目内容
计算.
(1)(-3)×(-2
)+(-5)×2
-4×
;
(2)(-29
)×26;
(3)-4×(-
-
+1
-
)×15.
(1)(-3)×(-2
| 1 |
| 6 |
| 1 |
| 6 |
| 13 |
| 6 |
(2)(-29
| 12 |
| 13 |
(3)-4×(-
| 5 |
| 6 |
| 1 |
| 5 |
| 1 |
| 4 |
| 11 |
| 12 |
(1)原式=3×
-5×
-4×
=
×(3-5-4)
=-6×
=-13;
(2)原式=(-30+
)×26
=-780+2
=-778;
(3)原式=-60×(-
-
+1
-
)
=50+12-75+55
=42.
| 13 |
| 6 |
| 13 |
| 6 |
| 13 |
| 6 |
=
| 13 |
| 6 |
=-6×
| 13 |
| 6 |
=-13;
(2)原式=(-30+
| 1 |
| 13 |
=-780+2
=-778;
(3)原式=-60×(-
| 5 |
| 6 |
| 1 |
| 5 |
| 1 |
| 4 |
| 11 |
| 12 |
=50+12-75+55
=42.
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