
计算(1)(-12)-5+(-14)-(-39)(2)(+14)+(?213)?(?234)(?(+323)(3)(?12?13+34)×(?12)(4)-120
计算(1)(-12)-5+(-14)-(-39)(2)(+14)+(?213)?(?234)(?(+323)(3)(?12?13+34)×(?12)(4)-12014-(...
计算(1)(-12)-5+(-14)-(-39)(2)(+14)+(?213)?(?234)(?(+323)(3)(?12?13+34)×(?12)(4)-12014-(1-0.5)÷3×(3-(|-3|2)
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(1)原式=-12-5-14+39=-31+39=8;
(2)原式=
+2
-2
-3
=3-6=-3;
(3)原式=6+4-9=1;
(4)原式=-1-
×
×(3-9)=-1+1=0.
(2)原式=
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4 |
3 |
4 |
1 |
3 |
2 |
3 |
(3)原式=6+4-9=1;
(4)原式=-1-
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2 |
1 |
3 |
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