题目内容
计算:
(1)-20-(-15)+(-12)-(+5);
(2)-14-(-2)2÷(-2)-(-3)3×(-
)2.
(1)-20-(-15)+(-12)-(+5);
(2)-14-(-2)2÷(-2)-(-3)3×(-
2 |
3 |
(1)-20-(-15)+(-12)-(+5)
=-20+15-12-5
=-37+25
=-12;
(2)-14-(-2)2÷(-2)-(-3)3×(-
)2
=-1-4÷(-2)-(-27)×
=-1+2+12
=13.
=-20+15-12-5
=-37+25
=-12;
(2)-14-(-2)2÷(-2)-(-3)3×(-
2 |
3 |
=-1-4÷(-2)-(-27)×
4 |
9 |
=-1+2+12
=13.
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