Question

Complete as igualdades
A) 9+1 = _+9
B) 3+6 =6+__
C) 10+3=_+_
D) 4+__= 1 +4
E) 3+__= a +__

Answer 1

a) 1
b)3
c)3+10
d)1
e)a?(nn entendi essa)