Two-Step Story Problems

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Two-Step Story Problems

• Our Goal Solve problems that require more than
  one solution step.

2
Retell and Solve

• Lana had 9 sheep and some horses on her farm.
  Altogether there were 17 animals. Her
  grandmother gave her 2 more horses. How many
  horses does she have now?
• What is the first step in the problem?
• What do you know for sure?

3
Retell and Solve

• Lana had 9 sheep and some horses on her farm.
  Altogether there were 17 animals. Her
  grandmother gave her 2 more horses. How many
  horses does she have now?
• We know we have _____ sheep, so. . .
• ____ sheep

4
Retell and Solve

• Lana had 9 sheep and some horses on her farm.
  Altogether there were 17 animals. Her
  grandmother gave her 2 more horses. How many
  horses does she have now?
• We know we have 9 sheep, so I need to draw __more
  horses to get to ____.
• 9 sheep ____ horses

5
Retell and Solve

• Lana had 9 sheep and some horses on her farm.
  Altogether there were 17 animals. Her
  grandmother gave her 2 more horses. How many
  horses does she have now?
• What is the second step in the problem?
• 9 sheep ____ horses

6
Retell and Solve

• Lana had 9 sheep and some horses on her farm.
  Altogether there were 17 animals. Her
  grandmother gave her 2 more horses. How many
  horses does she have now?
• What is the second step in the problem?
• Add 8 horses plus 2 more horses equals 10 horses.
• 9 sheep 8 horses ___ horses

7
Retell and Solve

• Lana had 9 sheep and some horses on her farm.
  Altogether there were 17 animals. Her
  grandmother gave her 2 more horses. How many
  horses does she have now?
• How else could we solve the story problem?
• 17A
• S H H

8
Retell and Solve

• Lana had 9 sheep and some horses on her farm.
  Altogether there were 17 animals. Her
  grandmother gave her 2 more horses. How many
  horses does she have now?
• How else could we solve the story problem?
• What about a Math Mountain and an equation?
• 17
• 9 8
• then
• 82

9
Retell and Solve

• Lana had 9 sheep and some horses on her farm.
  Altogether there were 17 animals. Her
  grandmother gave her 2 more horses. How many
  horses does she have now?
• How else could we solve the story problem?
• Is there a way to add first and then subtract?
• 17 total animals plus 2 horses is 19. 19 minus 9
  sheep is 10 horses!

10
Retell and Solve

• There are 14 computers in the school library. 5
  girls and 3 boys are using the computers right
  now. How many more students can use a computer?
  
• Retell the problem in your own words.
• What is the first step? What do you know for
  sure?

11
Retell and Solve

• There are 14 computers in the school library. 5
  girls and 3 boys are using the computers right
  now. How many more students can use a computer?
  
• What is the second step?

12
Retell and Solve

• There are 14 computers in the school library. 5
  girls and 3 boys are using the computers right
  now. How many more students can use a computer?
  

13
Retell and Solve

• There were 15 packages at the post office. 6
  were sent out. Then, people brought in 8 more.
  How many packages are at the post office now?
• Retell the problem in your own words.
• What is the first step? What do you know for
  sure?

14
Retell and Solve

• There were 15 packages at the post office. 6
  were sent out. Then, people brought in 8 more.
  How many packages are at the post office now?
• What is the second step?

15
Retell and Solve

• There were 15 packages at the post office. 6
  were sent out. Then, people brought in 8 more.
  How many packages are at the post office now?

16
Retell and Solve

• Mrs. Yu has 4 yellow flowers, 5 white flowers and
  some purple flowers in a vase. She has a total
  of 18 flowers. How many purple flowers are in
  the vase?
• Retell the problem in your own words.
• What is the first step? What do you know for
  sure?

17
Retell and Solve

• Mrs. Yu has 4 yellow flowers, 5 white flowers and
  some purple flowers in a vase. She has a total
  of 18 flowers. How many purple flowers are in
  the vase?
• What is the second step?

18
Retell and Solve

• Mrs. Yu has 4 yellow flowers, 5 white flowers and
  some purple flowers in a vase. She has a total
  of 18 flowers. How many purple flowers are in
  the vase?

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Problem Solving Strategy Reasonable Answers

• Choose a Reasonable Answer.
• Choose an answer that makes sense!

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Problem Solving Strategy Reasonable Answers

• Claire has 8 red pencils. She has more blue
  pencils than red pencils. How many blue pencils
  could Claire have?

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Problem Solving Strategy Reasonable Answers

• Claire has 8 red pencils. She has more blue
  pencils than red pencils. How many blue pencils
  could Claire have?
• Is 3 a reasonable answer for this problem?
• Why?

22
Problem Solving Strategy Reasonable Answers

• Claire has 8 red pencils. She has more blue
  pencils than red pencils. How many blue pencils
  could Claire have?
• What would be a reasonable answer?

23
Problem Solving Strategy Reasonable Answers

• Paige saw 3 goats, 7 pigs, and some horses at the
  fair. She saw 15 animals altogether. How many
  horses did Paige see?
• Is 16 a reasonable answer for the problem? Why?

24
Problem Solving Strategy Reasonable Answers

• Paige saw 3 goats, 7 pigs, and some horses at the
  fair. She saw 15 animals altogether. How many
  horses did Paige see?
• Is 16 a reasonable answer for the problem? Why?

25
Problem Solving Strategy Reasonable Answers

• Work with a partner.
• Read the problem.
• 3. Retell the problem in your own words.
• Look at each answer to find which answer is
  reasonable.
• Circle the most reasonable answer.

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Great Thinking!