Positive Numbers and the Number Line

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Presentation transcript:

Positive Numbers and the Number Line

Unit 1 – Factoring Sums

Vocabulary Factor (verb) – to express as a product of two or more factors.

Factoring Sums Procedure Step 1: Find the GCF of the numbers in the sum Step 2: Rewrite the original numbers as a multiplication table using the GCF Step 3: Pull out the common factor and rewrite the remaining factors as a sum (This will become more clear after we do a few examples…I promise)

Factoring Sums Example Factor the following sum 18 + 45 Step 1: The GCF is 9 Step 2: 18 9 × 2 45 9 × 5 Step 3: 9(2 + 5)

Factoring Sums Example Express the sum of each pair of numbers as a product of the greatest common factor of the number and another sum 35 + 21 Step 1: The GCF is 7 Step 2: 35 7 × 5 45 7 × 3 Step 3: 7(5 + 3)

Factoring Sums Example Express the sum of each pair of numbers as a product of the greatest common factor of the number and another sum 48 + 60 Step 1: The GCF is 12 Step 2: 48 12 × 4 60 12 × 5 Step 3: 12(4 + 5)

Independent Practice Express the sum of each pair of numbers as a product of the greatest common factor of the numbers and another sum. 35 + 91 7(5 + 13) 60 + 85 5(12 + 17) 24 + 64 8(3 + 8) 21 + 18 3(7 + 6)