Question

237+(49-237)-(49-21)

 

Answer 1

bằng 21 nha bn

yick mk nha

Answer 2

237 + ( 49 - 237 ) - ( 49 - 21 )

= 237 + 49 - 237 - 49 + 21

= ( 237 - 237 ) + ( 49 - 49 ) + 21

= 0 + 0 + 21

= 21

Answer 3

237 + (49 - 237) - (49 - 21)

= 237 + 49 - 237 - 49 +21

= 0 + 0 + 21 = 21

Answer 4

237+(49-237)-(49-21)

=237+49-237-49-21

=(237-237)-(49-49)+21

=0+0+21

=21