问题
解答题
计算: (1)-20-(-15)+(-12)-(+5); (2)-14-(-2)2÷(-2)-(-3)3×(-
|
答案
(1)-20-(-15)+(-12)-(+5)
=-20+15-12-5
=-37+25
=-12;
(2)-14-(-2)2÷(-2)-(-3)3×(-
)22 3
=-1-4÷(-2)-(-27)×4 9
=-1+2+12
=13.
计算: (1)-20-(-15)+(-12)-(+5); (2)-14-(-2)2÷(-2)-(-3)3×(-
|
(1)-20-(-15)+(-12)-(+5)
=-20+15-12-5
=-37+25
=-12;
(2)-14-(-2)2÷(-2)-(-3)3×(-
)22 3
=-1-4÷(-2)-(-27)×4 9
=-1+2+12
=13.