BIG Upcoming Multiplication and Division Unit #3rdGradeMath

Please read ENTIRE post. Thank you for your partnership! This is a BIG unit for us and will begin after Thanksgiving. 

3.OA.1 Find the product of whole numbers

3.OA.2 Find the quotient of whole numbers

3.OA.3 Use multiplication and division to solve word problems

3.OA.4 Find the unknown number in an equation

3.OA.5 Use properties of operations to multiply and divide

3.OA.6 Use division to find an unknown factor

3.OA.7 Fluently multiply and divide within 100

3.OA.8 Solve two-step word problems using the four operations

3.OA.9 Identify patterns on an addition table and multiplication table

3.OA.1 I can understand multiplication by thinking about groups of objects. 

EXAMPLE: Kyra purchased 5 boxes of donuts. Each box has 2 donuts in it. How many donuts did Kyra purchase?

3.OA.2 I can understand division by thinking about how one group can be divided into smaller groups. 

EXAMPLE: Susie made 15 cookies. She wants 5 cookies in each bag. How many bags does she need?

3.OA.3 I can use what I know about multiplication and division to solve word problems.

EXAMPLE: 27 people can ride on a roller coaster at one time. Each car seats 3 people. How many cars are on the roller coaster?

3.OA.4 I can find the missing number in a multiplication or division equation. 

EXAMPLE: 4x n=32    n=8

28÷n = 4    n=7

3.OA.5 I can use the commutative property of multiplication (I know that if 6×4=24, then 4×6=24).

I can use the associative property of multiplication (To figure out 3x5x2, I can multiply 3×5=15, then 15×2=30 OR multiply 5×2=10, then 10×3=30)

I can use the distributive property of multiplication (to figure out 8×7, I can think of 8x(5+2), which means (8×5) + (8×2)=40+16 = 56

3.OA.6 I can find the answer to a division problem by thinking of the missing factor in a multiplication problem (I can figure out 32÷8 because I know that 8×4=32)

EXAMPLE: Write 2×9 as a division sentence.

Joe knows 4×6 =24, so 24 donuts are divided into 4 boxes. There are 6 in each box. 

Can you use a multiplication problem to help you solve 63 ÷ 7?  YES, you can use 9×7! 

3.OA.7 I can multiply and divide within 100 easily and quickly because I know how multiplication and division are related.

EXAMPLE: You NEED to learn your math facts! What are some strategies to help you learn?

3.OA.8 I can use addition, subtraction, multiplication and division to solve two-step word problems.

EXAMPLE: Mike runs 3 miles a day. His goal is to run 30 miles. After 4 days, how many miles does Mike have left to run in order to make his goal?

3.OA.9 I can find patterns in addition and multiplication tables and explain them using what I know about how numbers work. 

EXAMPLE: Which number does not belong in the pattern below?

4,8,12,16,20,24,26,28,32

In        Out

4                   6

6                   8

8

10

 

 

 

 

 

 

 

 

 

 

 

 

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