计算下列各题(1)-13-(1+0.5)×(-13);(2)(+12)-(+5)+(-13)-(+14)+(+523);(3)(74-78-712)÷(-78)+(-83);(4)(-3)2÷94×(-23)2÷4-22×(-13)2.-数学
题文
计算下列各题 (1)-13-(1+0.5)×(-
(2)(+
(3)(
(4)(-3)2÷
|
答案
(1)-13-(1+0.5)×(-
=-1-(1.5)×(-
=-1+1.5×
=-1+0.5 =-0.5; (2)(+
=
=6
=
(3)(
|