计算题(1)-6+10-3+|-9|(2)(-5.3)+(-3.2)-(-2.5)-|-5.7|(3)?23÷49×(?23)2+(?0.8)?5×(?122)
计算题(1)-6+10-3+|-9|(2)(-5.3)+(-3.2)-(-2.5)-|-5.7|(3)?23÷49×(?23)2+(?0.8)?5×(?122)(4)?1...
计算题(1)-6+10-3+|-9|(2)(-5.3)+(-3.2)-(-2.5)-|-5.7|(3)?23÷49×(?23)2+(?0.8)?5×(?122)(4)?14?[2?(1?13×0.5)]×(32?(?2)2](5)(5ab+3a2)+(-2b2-4ba)(6)12a?3(2a?23b2)+(?32a+b2).
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(1)-6+10-3+|-9|
=-6+10-3+9
=-9+19
=10;
(2)(-5.3)+(-3.2)-(-2.5)-|-5.7|
=-5.3-3.2+2.5-5.7
=-14.2+2.5
=-11.7;
(3)?23÷
×(?
)2+(?0.8)?5×(?
)
=-8×
×
-0.8-5×(-
)
=-8-0.8+1.25
=-7.55;
(4)?14?[2?(1?
×0.5)]×(32?(?2)2]
=-1-[2-(1-
]×[9-4]
=-1-[2-
]×5
=-1-
×5
=-1-5
=-6
;
(5)(5ab+3a2)+(-2b2-4ba)
=5ab+3a2-2b2-4ba
=ab+3a2-2b2;
(6)
a?3(2a?
b2)+(?
a+b2)
=
a-6a+2b2-
a+b2
=-7a+3b2.
=-6+10-3+9
=-9+19
=10;
(2)(-5.3)+(-3.2)-(-2.5)-|-5.7|
=-5.3-3.2+2.5-5.7
=-14.2+2.5
=-11.7;
(3)?23÷
4 |
9 |
2 |
3 |
1 |
22 |
=-8×
9 |
4 |
4 |
9 |
1 |
4 |
=-8-0.8+1.25
=-7.55;
(4)?14?[2?(1?
1 |
3 |
=-1-[2-(1-
1 |
6 |
=-1-[2-
5 |
6 |
=-1-
7 |
6 |
=-1-5
5 |
6 |
=-6
5 |
6 |
(5)(5ab+3a2)+(-2b2-4ba)
=5ab+3a2-2b2-4ba
=ab+3a2-2b2;
(6)
1 |
2 |
2 |
3 |
3 |
2 |
=
1 |
2 |
3 |
2 |
=-7a+3b2.
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