Question

tính nhanh

( 26 + 53 ) + ( 42 - 26 - 55 - 53 )

Answer 1

( 26 + 53 ) + ( 42 - 26 - 55 - 53 )

= ( 26 - 26 ) + ( 53 - 53 ) - 55 + 42 = 0 + 0 - 55 + 42 = - 13

Answer 2

(26 + 53) +( 42 -26- 55 - 53)

=-13

Answer 3

( 26 + 53 ) + ( 42 - 26 - 55 - 53 )

= ( 26 - 26 ) + ( 53 - 53 ) + 42 + 55

= 0 + 0 + 42 + 55

= 97

Answer 4

(26+53)+(42-26-55-53)

=(53-53)+(26-26)-55+42

=0+0-13

=-13