GCF, LCM, and Rational Numbers

GCF

100

What might we use the GCF in math?

to simplify fractions

200

What is the GCF of 6 and 7

1

300

Find the GCF of 12 and 20

4

400

Find the GCF of 24, 32, and 40

8

500

Find the GCF and LCM of 12 and 27

GCF = 3

LCM = 108

LCM

100

When might we use the LCM in math?

As a common denominator

200

What is the LCM of 6 and 7

42

300

Find the LCM of 12 and 20

60

400

Find the least common multiple of 24, 32, and 40

480

500

Find the GCF and LCM of 45 and 75

GCF = 15

LCM = 225

Comparing Rational Numbers

100

Write an inequality to compare 7.5 and -7 1/4

-7 1/4 < 7.5 

or 7.5 > -7 1/4

200

Write an inequality to compare -22.8 and -23.34

-22.8 > -23.34

or   -23.34 < -22.8

300

Compare 45.8 to 45 3/4

45.8 > 45 3/4

or   45 3/4 < 45.8

400

Compare -2/5 and  -0.44

-2/5 > -0.44

or   -0.44 < -2/5

500

Compare -67.67 and -67 134/200

-67.67 = -67 134/200

Ordering Rational Numbers

100

Which side of the number line would you start on if ordering numbers from least to greatest?

left side

200

Write the numbers in order from least to greatest:

3/8, 1/4, 7/8

1/4, 3/8, 7/8

300

Write the numbers in order from least to greatest:

-10, 2, -0.5, 5/16

-10, -0.5, 5/16, 2

400

Order these numbers from greatest to least

2, -1.5, -2 1/4, 1.75, -1

2, 1.75, -1, -1.5, -2 1/4

500

order these numbers from least to greatest:

-32, 31 1/2, -31.7, 31.75, -32 1/4

-32 1/4, -32, -31.7, 31 1/2, 31.75

Vocabulary

100

What does GCF stand for?

greatest common factor

200

What LCM stands for.

What is Least Common Multiple

300

The same distance from zero, but on the other side.

What is opposite

400

The distance a number is from zero.

What is absolute value?

500

What types of numbers make up Rational Numbers?

Positive and negative whole numbers, fractions, and decimals.