1. 6.4a – Solving Story Problems
Using Guess and Check
Definitions of the Day (DODs)
Guess and Check
Story Problem

2. Definition: Guess and Check –
A very simple, but effective method of solving complex problems by making guesses and checking answers
Definition:
Story Problem – A math problem that involves a story. A.k.a. “Word Problem”

3. Solve the Story Problem by Guess and Check
Let’s Explore!!
Solve the Story Problem by Guess and Check
Old MacDonald had a farm.
On his farm he had some cows. Moo, moo, moo.
On his farm he had some ducks. Quack, quack, quack.
The problem: he knows that he has a total of 100 animals and he can look under the fence of his coral and count 316 feet.
How many of each animal does he have?

4. # of Cows # of Ducks # of Feet High or Low?50 50
50(4) + 50(2) = 300
Low 70 30
70(4) + 30(2) = 340
High 60 40
60(4) + 40(2) = 320
High 55 45
55(4) + 45(2) = 310
Low 58 42
58(4) + 42(2) = 316
Done!!

5. Solve the Story Problem by Guess and Check
Example
Solve the Story Problem by Guess and Check
An art class is planning a field trip to a museum. There are 22 people in the class and the class can take 4 vehicles. (only 4 drivers are available)
If a van can hold 6 people and a car can hold 4 people, how many cars and how many vans should the teacher reserve.
Note: (vans are more expensive…so the class does not want to rent only vans)

6. Your Turn!!
Solve the following story problem by Guess and Check
The Healdsburg HS Drama class put on a play last Saturday night.
They knew that they sold 150 tickets and made a total of $1011.
If the adult tickets were $8 each and the student tickets were $5 each, how many of each were sold?

7. Sentence Frames
Describe how the “Guess and Check” method of problem solving works ___________________________________________
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