题目内容
计算题
(1)-40-28-(-19)+(-24)
(2)(
-
-
)×(-60)
(3)(-3)×
÷(-2)×(-
)
(4)(-1)100-
×[3-(-3)2]
(5)a+(4a-3b)-(a-2b)
(6)( 5a2+2b2)-3(a2-4b2)
(1)-40-28-(-19)+(-24)
(2)(
| 2 |
| 3 |
| 1 |
| 12 |
| 1 |
| 15 |
(3)(-3)×
| 1 |
| 3 |
| 1 |
| 2 |
(4)(-1)100-
| 1 |
| 6 |
(5)a+(4a-3b)-(a-2b)
(6)( 5a2+2b2)-3(a2-4b2)
(1)原式=-40-28+19-24
=-92+19
=-73;
(2)原式=-60×
+60×
+60×
=-40+5+4
=-31;
(3)原式=-3×
×(-
)×(-
)
=-
;
(4)原式=1-
×(3-9)
=1-
×(-6)
=1+1
=2;
(5)原式=a+4a-3b-a+2b
=4a-b;
(6)原式=5a2+2b2-3a2+12b2
=2a2+14b2.
=-92+19
=-73;
(2)原式=-60×
| 2 |
| 3 |
| 1 |
| 12 |
| 1 |
| 15 |
=-40+5+4
=-31;
(3)原式=-3×
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
=-
| 1 |
| 4 |
(4)原式=1-
| 1 |
| 6 |
=1-
| 1 |
| 6 |
=1+1
=2;
(5)原式=a+4a-3b-a+2b
=4a-b;
(6)原式=5a2+2b2-3a2+12b2
=2a2+14b2.
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