Question

[Trần Diệu Hà]

Bài 1

a) (-23)+15+18+23

b) (- 57)+(-1590)+47+169

c) (-9)+301+(- 511) + 119

d)(279 _ 1987) + ( -18 + 1987 - 279 )

e) - ( 3251+415) - ( 2000 + 585 - 251 )

g) 71- ( - 30 ) - (+18)+( - 30 ) + (+118)

f) - 25 -26 -27 -28 -29 +15+16+17+18+19

Answer 1

[Nguyễn Thị Hồng Thảo]

a, 33	e,-6000
b,-1431	g,171
c,-100	f,-50
d,-18