pre algebra lesson 3 1

8/13/2019 Pre Algebra Lesson 3 1

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3-1 Problem-Solving Strategy:

Eliminate Possibilities

Objective: Solve problems by

eliminating possibilities.



5-Minute Check

Solve each equation.

1. x = 4 – (-5)



5-Minute Check


1. x = 4 – (-5) 9



5-Minute Check


1. x = 4 – (-5)

2. n = (4)(-5)



5-Minute Check


1. x = 4 – (-5)

2. n = (4)(-5) -20



5-Minute Check


1. x = 4 – (-5)

2. n = (4)(-5)3. -8 -2 = m



5-Minute Check


1. x = 4 – (-5)

2. n = (4)(-5)3. -8 -2 = m 4



5-Minute Check


1. x = 4 – (-5)

2. n = (4)(-5)3. -8 -2 = m

Simplify each expression.

4. 8t – 3t + 2t



5-Minute Check


1. x = 4 – (-5)

2. n = (4)(-5)3. -8 -2 = m


4. 8t – 3t + 2t 7t



5-Minute Check


1. x = 4 – (-5)

2. n = (4)(-5)3. -8 -2 = m


4. 8t – 3t + 2t

5. – 9k – (-9k)



5-Minute Check


1. x = 4 – (-5)

2. n = (4)(-5)3. -8 -2 = m


4. 8t – 3t + 2t

5. – 9k – (-9k) 0





Example

Gene is going to his friend Jan’s family reunion. He wants to learn

the names of Jan’s aunt, uncle, cousin, sister, and grandfather. Use

the following clues to help Jan match the names to the correctrelative.

Sue played racquetball Tuesday

Marla is an only child.

Jan’s sister does not like racquet sports.

John’s son is Jan’s father. Tom and Marla are married.

Explore You must match each relative with his or her name by

examining the given clues





Example








Plan Make a chart to organize the clues.





Example








Solve Set up a chart with the names as the first row and the

relative labels as th first column.





Example








Solve Place an X in a box if you know from the clues that a

certain person cannot be a certain relative. Place a

circle when you know a name and a relative.





Sue Tom Marla Sara John

Sister

AuntGrandfather

Cousin

uncle





Sue Tom Marla Sara John

Sister X X X O X

Aunt X X O X XGrandfather X X X X O

Cousin O X X X X

uncle X O X X X





Integration

Choose the correct number from the following list:

54, 2, 1, 24, 126, 27, 73, 108





Integration


54, 2, 1, 24, 126, 27, 73, 108

The number is not a prime number.





Integration


54, 2, 1, 24, 126, 27, 73, 108


The number is not divisible by 9.

The number is greater than 10.

The number is





Integration


54, 2, 1, 24, 126, 27, 73, 108


The number is not divisible by 9.

The number is greater than 10.

The number is 24.

pre algebra lesson 3 1

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