2.1 Patterns of Multiplication Objective: 6.C.1.a Multiply Whole Numbers Assessment limits: Use a 3-digit factor by any other factor with no more than 2-digits and whole numbers (0-10,000)

Multiplication Repeated Addition

Factor A number multiplied to give a product; for example, 3 and 5 in 3 X 5

Product The answer in a multiplication problem

Use basic facts and patterns to find products Find 400 X 700 Basic fact is 4 X 7 = 28 Pattern: 4 X 70 = X 700 = X 700 = 2, X 700 = 280,000

You can count the zeros in the factors Step 1: Find the Basic Fact 4 X 7 = 28 Step 2: Count the number of zeros in each factor. 400 X Zeros + 2 zeros= 4 zeros Step 3: Write the zeros to the right of the product in Step X 700 = 280,000 Product from Step 1 Zeros From Step 2

Think: Sometimes there is an extra zero in the product. Can anyone give me an example? Basic Fact 5 X 6 = Pattern: 5 X 60 = X 600 = X 600 = 3, X 600 = 300,

Multiply 4 X 400 = 1,600

Multiply 6 X 50 = 300

Multiply 100 X 12 = 1,200

Copy and Complete 2 X 40 = 80 2 X 400 = X 400 = 200 X 400 = ,000

Copy and Complete 7 X 50 = 7 X 500 = X 500 = 700 X 500 = ,

Copy and Complete 8 X 120 = 8 X 1200 = 80 X 1200 = 800 X 1200 = ,

Copy and Complete 5 X 60 = 5 X 600 = X 600 = 500 X 600 = ,