题目内容
计算
(1)-4-28-(-29)+(-24);
(2)4×(-3)2-5×(-2)+6;
(3)(
-
+
)×(-42);
(4)-14-
×[3-(-3)2].
(1)-4-28-(-29)+(-24);
(2)4×(-3)2-5×(-2)+6;
(3)(
| 1 |
| 6 |
| 5 |
| 7 |
| 2 |
| 3 |
(4)-14-
| 1 |
| 6 |
(1)原式=-4-28+29-24
=-4-28-24+29
=--56+29
=-27;
(2)原式=4×9+5×2+6
=36+10+6
=52;
(3)原式=-
×42+
×42-
×42
=-7+30-28
=-5;
(4)原式=-1-
(3-9)
=-1+1
=0.
=-4-28-24+29
=--56+29
=-27;
(2)原式=4×9+5×2+6
=36+10+6
=52;
(3)原式=-
| 1 |
| 6 |
| 5 |
| 7 |
| 2 |
| 3 |
=-7+30-28
=-5;
(4)原式=-1-
| 1 |
| 6 |
=-1+1
=0.
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