Question

 tinh nhanh 294+315+575+685+706

Answer 1

294+315+575+685+706=2575

k mk nha!

Answer 2

=294+706+315+685=1000+1000+575=1575

Answer 3

( 294 + 706 ) + ( 315 + 685) + 575 

=    1000       +      1000      + 575

=               2000                 + 575

=                                  2575

k mk nha ^_^

Answer 4

= ( 294 + 706 ) + ( 315 + 685 ) + 575

= 1000 + 1000 + 575

= 2575

Answer 5

x+25=35

Answer 6

x+37=51

Answer 7

x+25=51   x=51-25            x=26