Operations

associative property of addition and multiplication
Addition: (a + b) + c = a + (b + c); (4 +3) +2 = 4 + (3 + 2) Multiplication: (a x b) x c= a x (b x c); (5 x 4) x 3 = 5 x (4 x 3)

a(b + c) = (a x b) + (a x c); 5( 4 + 3) = (5 x 4) + (5 x 3)
inverse operations for addition and multiplication – Addition and subtraction: n A + b = c 5 + 4 = 9 n c – a = b 9 – 5 = 4 n c – b = a 9 – 4 = 5 Multiplication and Division A x b = c 9 x 3 = 27 C / a = b 27 / 9 = 2 C / b = a 27 / 3 = 9