题目内容
计算或化简
(1)(-3)+(-4)-(+11)-(-9);
(2)(
-
-
)×(-60);
(3))23÷[(-3)3-(-4)];
(4)-14÷(-5)2×(-
)+|0.8-1|.
(5)2a3b-
a3b-a2b+
a2b-ab2
(6)2(2a2+9b)+3(-5a2-4b)
(1)(-3)+(-4)-(+11)-(-9);
(2)(
2 |
3 |
1 |
12 |
1 |
15 |
(3))23÷[(-3)3-(-4)];
(4)-14÷(-5)2×(-
5 |
3 |
(5)2a3b-
1 |
2 |
1 |
2 |
(6)2(2a2+9b)+3(-5a2-4b)
(1)原式=-3-4-11+9
=-7-11+9
=-18+9
=-9;
(2)原式=
×(-60)-
×(-60)-
×(-60)
=-40+5+4
=-31;
(3)原式=23÷[-27+4]
=23÷(-23)
=-1;
(4)原式=-1÷25×(-
)+0.2
=-
×(-
)+0.2
=
+0.2
=
;
(5)原式=(2-
)a3b-(1-
)a2b-ab2
=
a3b-
a2b-ab2;
(6)原式=4a2+18b-15a2-12b
=-11a2+6b.
=-7-11+9
=-18+9
=-9;
(2)原式=
2 |
3 |
1 |
12 |
1 |
15 |
=-40+5+4
=-31;
(3)原式=23÷[-27+4]
=23÷(-23)
=-1;
(4)原式=-1÷25×(-
5 |
3 |
=-
1 |
25 |
5 |
3 |
=
1 |
15 |
=
4 |
15 |
(5)原式=(2-
1 |
2 |
1 |
2 |
=
3 |
2 |
1 |
2 |
(6)原式=4a2+18b-15a2-12b
=-11a2+6b.
练习册系列答案
相关题目