Question

AYUDENMEEE PLIS DOY CORONA​

Answer 1

Respuesta:

( 3 + 7 ) + 6 = 3 + ( 7 + 6 )

10 + 6 = 3 + 13

16 = 16

( 6 + 8 ) + 5 = 6 + ( 8 + 5 )

14 + 5 = 6 + 13

19 = 19

( 4 + 8 ) + 9 = 4 + ( 8 + 9 )

12 + 9 = 4 + 17

21 = 21

( 7 + 9 ) + 2 = 7 + ( 9 + 2 )

16 + 2 = 7 + 11

18 = 18