计算或化简:(1)(-3)-(-6)-(+11)-(-9)(2)-22×7-(-3)×6+8(3)-34×[-32×(-23)2-2](4)
计算或化简:(1)(-3)-(-6)-(+11)-(-9)(2)-22×7-(-3)×6+8(3)-34×[-32×(-23)2-2](4)-14-(1-0.5)×13×...
计算或化简:(1)(-3)-(-6)-(+11)-(-9)(2)-22×7-(-3)×6+8(3)-34×[-32×(-23)2-2](4)-14-(1-0.5)×13×[2-(-3)2](5)a-(3a+b)+(a-5b) (6)5abc-2a2b-[3abc-3(4ab2+a2b)].
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(1)原式=-3+6-11+9=-14+15=1;
(2)原式=-4×7+3×6+8=-28+18+8=-2;
(3)原式=-
×(-9×
-2)=-
×(-6)=
;
(4)原式=-1-0.5×
×(-7)=-1+
=
;
(5)原式=a-3a-b+a-5b=-3a-6b;
(6)原式=5abc-2a2b-[3abc-(12ab2+3a2b)]
=5abc-2a2b-(3abc-12ab2-3a2b)
=5abc-2a2b-3abc+12ab2+3a2b
=2abc+12ab2+a2b.
(2)原式=-4×7+3×6+8=-28+18+8=-2;
(3)原式=-
3 |
4 |
4 |
9 |
3 |
4 |
9 |
2 |
(4)原式=-1-0.5×
1 |
3 |
7 |
6 |
1 |
6 |
(5)原式=a-3a-b+a-5b=-3a-6b;
(6)原式=5abc-2a2b-[3abc-(12ab2+3a2b)]
=5abc-2a2b-(3abc-12ab2-3a2b)
=5abc-2a2b-3abc+12ab2+3a2b
=2abc+12ab2+a2b.
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