计算:(1)(-3)+(-4)-(+11)-(-9);(2)33.1-10.7-(-22.9)-|?2310|;(3)(23?112?115)×(?60
计算:(1)(-3)+(-4)-(+11)-(-9);(2)33.1-10.7-(-22.9)-|?2310|;(3)(23?112?115)×(?60);(4)(?81...
计算:(1)(-3)+(-4)-(+11)-(-9);(2)33.1-10.7-(-22.9)-|?2310|;(3)(23?112?115)×(?60);(4)(?81)×94÷49÷(?16);(5)?13?(1+0.5)×13÷(?4);(6)(-2)3-2×(-3)+|2-5|-(-1)2010.
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(1)原式=[(-3)+(-4)+(-11)]+9=-18+9=-9;
(2)原式=33.1-10.7+22.9-2.3=(33.1+22.9)-(10.7+2.3)=56-13=43;
(3)原式=(-60)×
-(-60)×
-(-60)×
=-40+5+4=-31;
(4)原式=(-81)×
×
×(-
)=
;
(5)原式=-1-1.5×
×(-
)=-1+0.125=-0.875;
(6)原式=(-8)+6+3-1=-2+3-1=0.
(2)原式=33.1-10.7+22.9-2.3=(33.1+22.9)-(10.7+2.3)=56-13=43;
(3)原式=(-60)×
2 |
3 |
1 |
12 |
1 |
15 |
(4)原式=(-81)×
9 |
4 |
9 |
4 |
1 |
16 |
6561 |
256 |
(5)原式=-1-1.5×
1 |
3 |
1 |
4 |
(6)原式=(-8)+6+3-1=-2+3-1=0.
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