alguem poderia me ajudar nisso?


a) 0 + 3 = 3 + 0 ___________________________________________________________

b) 3 + 5 + 2 = 2 + 5 + 3 _____________________________________________________

c) 9 + 1 = 1 + 9 ___________________________________________________________

d) (4 + 2) + 5 = 4 +( 2 + 5) ____________________________________________________

e) 5 + 2 = 2 + 5 ___________________________________________________________

f) 7 + 0 = 0 + 7 ___________________________________________________________