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?