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Math LessonProblem Solving

Our learning objective To solve one-step story

problems using addition, subtraction, or

multiplication.

Why learn this?

In every-day life, we need to use math to solve

problems and find answers.

Before we begin, if you can remember one word,

you can remember the steps to solve a word

problem.

The word is

R.O.S.E.

Problem Solving is easy if you remember these

steps

- Read the problem carefully

- Pick the Operation

- Solve the problem

- Examine your answer

R.O.S.E.

Read the problem carefully

Step 1 Read the problem carefully

- Key word CAREFULLY
- Find the important information.
- Write down the numbers you will need to use.

Step 1 - Read the problemRead the problem

carefully.

- Nick earned 14 Accelerated Reading points the

first week of November. At the end of the

following week he had a total of 31 points. How

many points did he earn the second week?

Step 1 - Read the problemFind the important

information.

- Nick earned 14 Accelerated Reading points the

first week of November. At the end of the

following week he had a total of 31 points. How

many points did he earn the second week?

Step 1 - Read the problemWrite down the numbers.

- Nick earned 14 Accelerated Reading points the

first week of November. At the end of the

following week he had a total of 31 points. How

many points did he earn the second week?

Total 31

1st week 14

R.O.S.E.

Pick the Operation

Step 2 Pick the Operation

- Look for key words
- Identify what the problem wants you to solve.
- Ask if your answer is going to be a larger or

smaller number compared to what you already know.

Step 2 - Pick the OperationIdentify what the

problem wants you to solve.

- Nick earned 14 Accelerated Reading points the

first week of November. At the end of the

following week he had a total of 31 points. How

many points did he earn the second week?

Total 31

1st week 14

2nd week ?

Step 2 - Pick the Operation Ask if your answer

is going to be a larger or smaller number

compared to what you already know.

Total 31

1st week 14

2nd week ?

It will be smaller than the total but may or may

not be smaller than the first week.

R.O.S.E.

Solve the problem

Step 3 Solve the problem

- Choose a method
- Do your calculations carefully.
- Always always ALWAYS show your work!

Step 3 Solve the problemChoose a method

- Use a graph Use formulas
- Write an equation Make a list
- Find a pattern Work backwards
- Use reasoning Draw a picture
- Make a table Act it out

Step 3 Solve the problem Do your calculations

Total 31

1st week 14

2nd week ?

- Since I know both weeks total 31
- I write
- 14 s 31

Step 3 Solve the problem Do your calculations

Total 31

1st week 14

2nd week ?

- I can use the inverse operation
- to solve for s
- 14 s 31 31 14 s

Step 3 Solve the problem Always show your work

1st week 14

Total 31

2nd week ?

2

1

- 3 1
- 1 4

7

1

R.O.S.E.

Examine your answer

Step 4 Examine your answer

- Re-read the problem
- Substitute your new number to see if it works
- Make sure you record the units correctly.
- (25 dollars are not the same as 25 rubber

chickens!)

Step 4 Examine your answerReread the problem

- Nick earned 14 Accelerated Reading points the

first week of November. At the end of the

following week he had a total of 31 points. How

many points did he earn the second week?

Total 31

1st week 14

Step 4 Examine your answer Substitute your new

number

- Nick earned 14 Accelerated Reading points the

first week of November. At the end of the

following week he had a total of 31 points. How

many points did he earn the second week?

Total 31

1st week 14

2nd week 17 points

Step 4 Examine your answer Substitute your new

number

- Nick earned 14 Accelerated Reading points the

first week of November. At the end of the

following week he had a total of 31 points. How

many points did he earn the second week?

Did your new number work?

14 17 31

Now watch as I show you how to answer a word

problem using the R.O.S.E. method.

- Miss Paige looked out her window to find 19

hungry kittens staring back at her. She fed each

kitten 2 cans of tuna. The next morning, 57 more

kittens had come looking for a feast. How many

kittens are there now?

for understanding

- What steps can you follow to solve a word

problem? - Why are we learning this?
- Show me some thumbs.

Brain Break!

Your turnto practice!

- Remember the R.O.S.E.
- - Read the problem carefully
- - Pick the Operation
- - Solve the problem
- - Examine your answer

- Karlas family is having a cookout. She buys 4

packages of hotdog buns. There are 8 buns in

each package. How many hotdog buns did Karla buy?

- Lukes cleaned out the refrigerator for his mom.

He found 7 old apples, 5 wrinkled oranges, 2

black bananas, 12 spotty lemons, 6 squishy

peaches, 3 bowls of oatmeal, 9 moldy cookies, and

a pear with a bite missing. How many pieces of

fruit did Lukes find?

- Kalebs pet is a king snake name Bob. Bob is

still very young, so he is only 13 inches long.

When he is full-grown, he will be 48 inches long!

How much longer will Bob be when he is grown

than he is now?

- Jonathan has twice as many Webkinz as Kennedy.

If Kennedy has 12 Webkinz, how many does Jonathan

have?

- Ian was sure he saw a shark in his pool. He said

the shark probably weighed 2 zillion pounds and

had 660 teeth! Ian was telling a very big lie. A

real shark doesn't weigh 2 zillion pounds. Some

sharks do have 3,000 teeth, though. How many more

teeth can a real shark have than Ians imaginary

shark?

- Be thankful if a fire ant has never bitten you!

Cierra got four bites on her left hand, two bites

on her right hand, three bites on her left foot,

five bites on her leg, and twenty-seven bites on

her back where she cant even reach. How many

times did Cierra get bitten?

Review

- What are the steps to solve a word problem?
- Why do you need to know how to use this

strategy?

Problem Solving is easy if you remember these

steps

- Read the problem carefully

- Pick the Operation

- Solve the problem

- Examine your answer

Words often signal what operation you should

choose.

- Addition
- sum
- total
- in all
- all together

- Subtraction
- difference
- how many more
- how many left
- fewer

- Multiplication
- groups of
- each

- in all

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