Identifique a propriedade ou a relação fundamental utilizada em cada igualdade a seguir. a) 5 . 7 = 7
Identifique a propriedade ou a relação fundamental utilizada em cada igualdade a seguir. a) 5 . 7 = 7 . 5
b) (5 + 2) + 3 = 5 + (2 + 3)
c) 7 – 3 = 4 → 4 + 3 = 7
d) 13 . (2 + 15) = 13 . 2 + 13 . 5
e) 15 + 0 = 0 + 15 = 15
f) 16 : 2 = 8 → 8 . 2 = 16
g) 22 + 45 = 45 + 22
i) 1 . 57 = 57 . 1 = 57
j) (15 – 8) . 5 = 15 . 5 – 8 . 5
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