Solving Word Problems Using Drawings and

Equations

Objective

I can solve multiplication and division word problems using drawings and equations with a variable.

Essential Questions1. What is a variable? How do we use it in

an equation?

2. What is multiplication? What cue words would you select to determine the operation in a word problem? How could I draw a picture using this information?

3. What is division? What cue words would you select to determine the operation in word problem? How could I draw a picture using this information?

With your face partner...

Discuss:

What is additive comparison?

What do problems involving additive comparison ask us to do?

What is multiplicative comparison?

What do problems involving multiplicative comparison ask us to do?

Additive Comparison vs. Multiplicative

ComparisonAdditive Comparison:

“How many more?”

Multiplicative Comparison:

“How many times as much?”

What is a variable?

Anything that can fill the spot of a missing number that we are trying to find.

It can be a: x ?

ModelBob has 5 baseball cards. Sally has 6 times as many baseball cards as Bob. How many baseball cards does Sally have?

Let’s try it together!There were 21 lunch boxes in the lost

and found on Monday. There are 10 lunch boxes in the lost and found on Friday. How many more lunch boxes were in the lost and found on Monday?

Think-Pair-ShareLaurie has 8 pencils in her desk. She has 4 times as many pencils as Chris. How many pencils does Chris have in his desk?

ClosureWhat does an additive comparison problem ask us to find?

What does a multiplicative comparison problem ask us to find?