1 Intro to New Material
zero property - any number times 0 is always 0
7 x 0 = 0 or 233,987 x 0 = 0
identity property - any number times 1 is always that number
7 x 1 = 7 or 233,987 x 1 = 233,987
commutative property - two numbers multiplied in any order give the same product
4 x 6 = 24 and 6 x 4 = 24
distributive property - break apart a problem into two simpler problems
4 x 6 = (2 x 6) + (2 x 6)
Watch flocabulary video on multiplication properties
2 Daily Common Core Review
A restaurant cuts its large pizza pies into 8 equal pieces. How many total pieces of pizza are in 9 pies?
3 Guided Practice
How can you break apart facts?
Turn and Talk
So we all know how to multiply facts with 0,1,2 and 5. We are going to combine these facts wit other facts.
Suppose we know that 2 x 4 = 8
Do you need to learn something new to learn 4 x 2 = 8?
What property is being shown here?
Turn and Talk
4 Student Practice
Create two 4 x 6 grids on grid paper. Write a multiplication expression for the first grid. Color the second grid with 2 colors to show 2 smaller grids. Make each smaller grid represent a multiplication fact that you already know. Write the multiplication expression for each of these grids.
Work with a partner. Use the grid paper to find 7 x 7 by breaking it apart into two facts.
Try 6 x 8 next.
Turn and talk to your partner about what the distributive property is. How or why can this be helpful?
Try One More
Darnel is replacing the wheels on 8 skateboards. Each skateboard has 4 wheels. How many wheels does he need in all?
View Khan academy video on multiplication
page 15 # 5 please do this in your notebook independently
Pg 15 # 6 -24 EVEN only
You may work QUIETLY together on this
HW Study for your Topic 3/4 Test
Key Standards Supported
Operations And Algebraic Thinking
Find all factor pairs for a whole number in the range 1–100. Recognize that a whole number is a multiple of each of its factors. Determine whether a given whole number in the range 1–100 is a multiple of a given one-digit number. Determine whether a given whole number in the range 1–100 is prime or composite.
Generate a number or shape pattern that follows a given rule. Identify apparent features of the pattern that were not explicit in the rule itself. For example, given the rule “Add 3” and the starting number 1, generate terms in the resulting sequence and observe that the terms appear to alternate between odd and even numbers. Explain informally why the numbers will continue to alternate in this way.
Interpret a multiplication equation as a comparison, e.g., interpret 35 = 5 × 7 as a statement that 35 is 5 times as many as 7 and 7 times as many as 5. Represent verbal statements of multiplicative comparisons as multiplication equations.
Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison.1
Solve multistep word problems posed with whole numbers and having whole-number answers using the four operations, including problems in which remainders must be interpreted. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.