计算:(1)-3-(-5);(2)3712-114-2712+1.25-418;(3)-22×(-3)-15÷56+12×(12-13)×32;(4)|2+(-12)3×52|÷9÷1(-0.75)2.-数学
题文
计算: (1)-3-(-5); (2)3
(3)-22×(-3)-15÷
(4)|2+(-
|
答案
(1)-3-(-5), =-3+5, =2; (2)3
=(3
=1-4
=-3
(3)-22×(-3)-15÷
=-4×(-3)-15×
=12-18+3, =15-18, =-3; (4)|2+(-
|