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Identity property of multiplicationThe identity property of multiplication, also called the multiplication property of one says that a number does not change when that number is multiplied by 1. Examples 3 × 1 = 3 10 × 1 = 10 6 × 1 = 6 68 × 1 = 68 1 × 4 = 4 1 × -9 = - 9 x × 1 = x (a + b) × 1 = a + b Multiplicative inverse property If you multiply two numbers and the product is 1, we call the two numbers multiplicative inverses or reciprocals of each other For example, 4 is the multiplicative inverse of 1/4 because 4 × 1/4 = 1 1/4 is also the multiplicative inverse of 4 because 1/4 × 4 = 1 Notice that the multiplicative inverse of 1 is 1. In fact, 1 and -1 are the only two numbers that can be their own multiplicative inverse Notice also that any number divided by 1 return the same number We call this the identity property of division Examples 2 ÷ 1 = 2 50 ÷ 1 = 50 -5 ÷ 1 = -5 Fun math game: Destroy numbered balls by adding to 10
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