Question

tính nhanh

-359+181+(-123)+350+(-172)

Answer 1

-359+181+[-123]+350+[-172]

=[[-359]+350]+[181+[-172]+[-123]

=-9+9+[-123]

=0+[-123]

=-12

Answer 2

-359  + 181 + ( -123 ) + 350 + ( -172 ) 

= [ -359 + ( -172 ) ] + ( 181 + 350 ) + (  -123 ) 

= -531 + 531 + ( -123 ) 

= 0 + ( -123 ) 

= -123