题目内容
计算
(1)-4-28-(-29)+(-24);
(2)-
×(-1
)÷(-2
);
(3)-14÷(-5)2×(-
)+|0.8-1|;
(4)[50-(
-
+
)×(-6)2]÷(-7)2;
(5)4x-(x-3y);
(6)5(3a2b-ab2)-4(-ab2+3a2b).
(1)-4-28-(-29)+(-24);
(2)-
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
(3)-14÷(-5)2×(-
| 5 |
| 3 |
(4)[50-(
| 7 |
| 9 |
| 11 |
| 12 |
| 1 |
| 6 |
(5)4x-(x-3y);
(6)5(3a2b-ab2)-4(-ab2+3a2b).
(1)原式=-32+29-24,
=-56+29,
=-27;
(2)原式=-
×(-
)÷(-
),
=
×(-
),
=-
;
(3)原式=-1÷25×(-
)+0.2,
=-
×(-
)+
,
=
;
(4)原式=(50-28+33-6)÷49,
=49÷49,
=1;
(5)原式=4x-x+3y,
=3x+3y;
(6)原式=15a2b-5ab2+4ab2-12a2b,
=3a2b-ab2.
=-56+29,
=-27;
(2)原式=-
| 3 |
| 4 |
| 3 |
| 2 |
| 9 |
| 4 |
=
| 3 |
| 2 |
| 4 |
| 9 |
=-
| 1 |
| 2 |
(3)原式=-1÷25×(-
| 5 |
| 3 |
=-
| 1 |
| 25 |
| 5 |
| 3 |
| 1 |
| 5 |
=
| 4 |
| 15 |
(4)原式=(50-28+33-6)÷49,
=49÷49,
=1;
(5)原式=4x-x+3y,
=3x+3y;
(6)原式=15a2b-5ab2+4ab2-12a2b,
=3a2b-ab2.
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