Question

13+27+13+37=......?

Answer 1

=40+50

=90

đúng 100%

Answer 2

13 + 27 + 13 + 37

= (13 +27) + (13 + 37)

= 40 + 50

= 90

Answer 3

=40+50

=90

Answer 4

13 + 27 + 13 + 27

= ( 13 + 27 ) + ( 13 + 27 )

= 40 + 40

= 40 x 2

=80

Answer 5

13 + 27 + 13 + 37

= 13 + 13 + 27 + 37

= 13 + 13 + 27 + 27 + 10

= 13 x 2 + 27 x 2 + 10

= 26 + 54 + 10

= 80 + 10

= 90