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Multiplying Integers 7 th Grade Math Pg. 107

DART statement: I can multiply integers.

Commutative Property of Multiplication The commutative property of multiplication states that two numbers can be multiplied in either order.

Example 4 x 3 = _____ 3 x 4 = _____

Multiplying Integers with Different Signs The product of two integers with DIFFERENT signs is NEGATIVE!

Examples 6(-4) = -24 -5(7) = ? -35 is correct!

Try these… 9(-2) They have different signs. So, will the product be positive or negative? Negative! 9(-2) = -18

On your own. 4(-6) -8(7) -5(12)

Multiplying Integers with the Same Sign The product of two integers with the SAME sign is POSITIVE!

 POSITIVE X POSITIVE = POSITIVE  NEGATIVE X NEGATIVE = POSITIVE  NEGATIVE X POSITIVE = NEGATIVE  POSITIVE X NEGATIVE = NEGATIVE

6(5) -6(-5) -6(5) 6(-5)

Examples:

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