Question

Tính theo cách hợp lý: -(24+73)-(39-173)+(139-26) ; -(145+52)+[(45-(-500)]-148

Answer 1

a: =-24-73-39+173+139-26

=-50+100+100

=200-50=150

b: =-145-52+45+500-148

=-100+500-200

=200