3.OA.1
The numbers being multiplied
What are factors?
Ethan teaches drum classes for 16 hours each week. Each class lasts 2 hours. How many classes does Ethan teach each week?
What is 8 classes?
Use friendly numbers to subtract mentally. Subtract 275 – 149.
280 - 150 = 130
Rounded to 50
What is any number between 45-54
This means that each group has the same number of objects.
What is equal groups?
This property states that the product of any number and 1 is that number.
What is the Identity Property of Multiplication?
6 × 20 = 6 × ( + )
6 × 20 = ( × )
+ ( × )
6 × 20 = 6 × ( 2 + 10 )
6 × 20 = ( 6 × 2 )
+ ( 6 × 10 )
The answer to a division equation?
What is the quotient?
Use mental math to find the sum.
349 + 263 =
What is 350 + 265 = 615 or 350 + 260 = 610?
Rounded to 100
Any number between 95-104
The is the number that is to be divided in a division problem.
What is the Dividend?
This property states that when the grouping of factors is changed, the product remains the same.
The Associative Property of Multiplication
The answer to a multiplication equation?
What is the product?
Zari puts 14 lettuce plants in a community garden. He puts 7 lettuce plants in each row. Write a division equation to find how many rows of lettuce plants Zari makes.
14 divided by 7 = 2
128 adults and 259 children are at the Owl Show. How could you use expanded form to find the number of people at the Owl Show?
100 + 20 + 8
200 + 50 + 9
------------------
300 + 80 + 7
Any number ending on the 0 or 5
What is a compatible number?
To means to separate into equal groups.
What is divide?
To find 9 × 8, I can use the to show 9 × (3 + 5) to find the product.
What is the Distributive Property?
What are the related facts for 5, 6, and 30?
5x6=30, 6x5=30, 30/5=6, 30/6=5
April uses the yarn to make 15 yarn animals. She packs the animals in bags. Each bag holds 3 yarn animals. How can you use the bar model to find the number of bags April needs? Draw the model
15 divided by 3 = 5
The bar model should have 3 bars with 5 animals in each bar
Estimate_________
715
+ 198
Estimate=915 or 920
Actual Answer=913
Any number ending in a 0
What is a friendly number?
You have learned that to is to exchange amounts of equal value to rename a number.
What is regroup?
You can multiply the factors in any order and the product will be the same
What is the Commutative Property?
Caroline says that if you multiply 4 by an even number or an odd number, the product is always even. Is Caroline correct? Explain.
Yes, because an even number will always be even and any odd number will always pair up to make the new number even
Select all the facts that have a quotient of 1.
A 0 ÷ 1
B 2 ÷ 2
C 0 ÷ 8
D 5 ÷ 5
E 8 ÷ 1
What is 2 divided by 2 and 5 divided by 5?
Do you need to regroup when you add 267 and 582? Explain your thinking.
Yes, you need to regroup the 14 tens into one 100 and 4 tens
Round to the nearest hundred.
674 and 407
What is 700 and 400?
BLANK operations are opposite operations. Multiplication and division are BLANK operations.
What is the Dividend?
What is Inverse Operations?
DAILY DOUBLE
Teacher's own question
$1,000!!!!! Yay, great job!