Bar

Models

Your Text

Here

What is

bar modeling?Bar modeling is a strategy

mathematician’s use to

solve word problems.

6

?

Your Text

Here

Going back in time…

KINDERGARTEN

Your Text

Here

Going back in time…

FIRST GRADE

Your Text

Here

Going back in time…

SECOND GRADE

Your Text

Here

Going back in time…

THIRD GRADE

Your Text

Here

And now today…

FOURTH GRADE

Your Text

Here

Types of Bar Modelsn As you know, there are many different

types of story problems. There are specific bar models to solve each kind of problem.

n The following slides will tell you each type of bar model.

Your Text

Here

Part-Whole Bar Model

n Mrs. Jones buys a cake for $15 and has

$42 left. How much money did Mrs. Jones

have at first?

?

15 42

Your Text

Here

Part-Whole Bar Model

n Maggie bought 6 boxes of pencils. Each box has 12 pencils in it. How many pencils did she buy?

?

6

Your Text

Here

Taking Away Bar Model

n Bob has 110 bottles of water. He sells 28 bottles of

water. How many bottles of water does he have

left?

110

?

28

Your Text

Here

Comparison Bar Model

n Paul buys 345 fruit bars. Kent buys 230 more fruit

bars than Paul. How many fruit bars does Ken buy?

?

345 230

Paul

Ken

Your Text

Here

What’s the process?n Just like there is a process to the Scientific Method, there is also a process for solving story problems.

n What do you know about the steps to solving story problems?

Your Text

Here

Step #1Read Read Read Read the entire problem.

Your Text

Here

Step #2ReReReRe----write write write write the question in sentence

form, leaving a space for the answer.

Your Text

Here

Step #3Determine whoDetermine whoDetermine whoDetermine who and/or whatwhatwhatwhat is

involved in the problem.

Your Text

Here

Step #4DrawDrawDrawDraw the unit bars.

Your Text

Here

Step #5ChunkChunkChunkChunk the problem, adjustadjustadjustadjust the unit

bars, and fill in the question mark. question mark. question mark. question mark.

Your Text

Here

Step #6Correctly computecomputecomputecompute the problem and

solve for the answer.

Your Text

Here

Step #7WriteWriteWriteWrite the answer in the sentence, and

make sure your answer makes sense. sense. sense. sense.

Your Text

Here

We did it!These are the steps we will use to

solve story problems.