Story Problems

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Presentation Transcript

Slide 1: 

Story Problems Logical Thinking Guess & Check

Slide 2: 

Which strategy on your problem solving folder would you use? Logical Thinking Why?

Slide 3: 

What is the answer? 1 Choice Why? The player will be out if he goes to second so he can only go to first base.

Slide 4: 

Let's Try a Harder Problem!

Slide 5: 

A dance festival was held in Cambridge. 32 children joined in the dances. 19 danced Mexican dances and 15 danced in African dances. How many children danced in both dances? Would a graphic organizer help us find the answer? Yes! What kind of organizer?

Slide 6: 

A dance festival was held in Cambridge. 32 children joined in the dances. 19 danced Mexican dances and 15 danced in African dances. How many children danced in both dances? Mexican African Both X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X X 19 +15 34 34 -32 2

Slide 7: 

How did the Venn diagram help us use logical thinking to solve the problem? When we used the Venn diagram we could see that we had too many people. Using logical thinking we compared our numbers. This showed us that 2 people were in both dances.

Slide 8: 

Which strategy on your problem solving folder would you use? Guess and Check Why?

Slide 9: 

What is the answer? 25 How do you know? 25 is half way to 50 and if you multiply 25 by 2 you get 50.

Slide 10: 

Let's Try a Harder Problem!

Slide 11: 

Carl divides his 15 games into two piles: games he owns and games his brother owns. He owns 3 more games than his brother. How many games does his brother own? How could we use the guess and check strategy to solve this problem? We could start with an educated guess - NOT a wild guess!

Slide 12: 

Carl divides his 15 games into two piles: games he owns and games his brother owns. He owns 3 more games than his brother. How many games does his brother own? With your team use guess and check to solve the problem. What is your answer? 6 games

Slide 13: 

Explain the steps you took to solve the problem.

Slide 14: 

These are the steps I took: I'll guess his brother owns 8 games. That means Carl owns 11 games. That's a total of 19 games. My guess is too high. I'll guess again. This time I'll guess his brother owns 6 games. That means Prince Carl owns 9 games. That's a total of 15 games. My guess is right. His brother owns 6 games. Does it matter if your first guesses were different than mine?