# 2.1 Day 3: Multiplying more than two integers

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2.1 Day 3: Multiplying more than two integers
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Multiplying Many Integers
When multiplying many integers, you can multiply from left to right For example, 3(-4)(-2) Do the first two numbers (-12)(-2) 24

Simplify -1 (-1) 1

Simplify -1(-1)(-1) 1(-1) -1

-1(-1)(-1)(-1) 1(-1)(-1) -1(-1) 1
Simplify -1(-1)(-1)(-1) 1(-1)(-1) -1(-1) 1

-1(-1)(-1)(-1)(-1) 1(-1)(-1)(-1) -1(-1)(-1) 1(-1) -1
Simplify -1(-1)(-1)(-1)(-1) 1(-1)(-1)(-1) -1(-1)(-1) 1(-1) -1

Simplify -1(-1)(-1)(-1)(-1)(-1) 1(-1)(-1)(-1)(-1) -1(-1)(-1)(-1) 1(-1)(-1) -1(-1) 1

See a Pattern?? What is the sign when there is an even number of negative signs? Positive

See a Pattern? What is the sign when there are an odd number of negative signs? Negative

Rule: When multiplying Integers,
If there is an even number of negative factors the product is positive If there is an odd number of negative factors the product is negative

Tell whether the answer is positive or negative
3(2)(-3) Negative 3(-2)(-3) Positive 3(2)(-3)(4)(-1) Positive 5(8)(-4)(2)(-3)(-4) Negative

285(1) 285 Try these: Multiply 1.) 15(-9) (-1) Answer will be positive
2.) -3 (-6)(-2) Answer will be negative 18(2) -36

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