计算:(1)(-212)+(+56)+(-12)+(+116);(2)(79-56+34-718)×36;(3)-23÷49×(-23)2+(-0.8)-5×(-122).-数学
题文
计算: (1)(-2
(2)(
(3)-23÷
|
答案
(1)(-2
=(-2
=-3+2 =-1; (2)(
=
=28-30+27-14 =11; (3)-23÷
|
题文
计算: (1)(-2
(2)(
(3)-23÷
|
答案
(1)(-2
=(-2
=-3+2 =-1; (2)(
=
=28-30+27-14 =11; (3)-23÷
|