计算:(1)-16+23+(-17)-(-7);(2)(-18)+(-14)-(-38)-(+12)-(-34)(3)(-12+34-58)×(-16)(4)-14+(1-0.5)×13×〔2-(-3)2〕-数学
题文
计算: (1)-16+23+(-17)-(-7); (2)(-
(3)(-
(4)-14+(1-0.5)×
|
答案
(1)-16+23+(-17)-(-7) =-16+23-17+7 =-33+30 =-3; (2)(-
=-
=(-
=
=
(3)(-
|
题文
计算: (1)-16+23+(-17)-(-7); (2)(-
(3)(-
(4)-14+(1-0.5)×
|
答案
(1)-16+23+(-17)-(-7) =-16+23-17+7 =-33+30 =-3; (2)(-
=-
=(-
=
=
(3)(-
|