6th Grade Final Review

• 343

• 777

• 21

• 73

• 2048

• 256

• 16

• 44

• 2

• 8

• 12

Answer explanation

Use GEMDAS

Groupings

Exponents

Multiplication and Division

Addition and Subtraction

Find the GCF of:

27 and 45

• 8

• 45

• 9

• 3

Answer explanation

Use a factor tree, list the factors, then make a Venn Diagram. Multiply the factors that the 2 numbers share that you placed in the middle of the Venn Diagram!

Find the GCF of:

28, 48, and 64

• 4

• 8

• 12

• 16

Answer explanation

Use a factor tree and list the factors. Use a Venn Diagram and multiply what factors the numbers have in common!

Find the LCM of:

6 and 20

• 2

• 26

• 120

• 60

Answer explanation

Use a factor tree, list the factors, and make a Venn Diagram. Multiply all of the values in the Venn Diagram.

Multiples of 10 are 10, 20, 30, 40, etc.

Find the LCM of:

12 and 28

• 336

• 72

• 4

• 40

Answer explanation

Use a factor tree, list the factors, and make a Venn Diagram. Multiply all of the values in the Venn Diagram.

Multiples of 10 are 10, 20, 30, 40, etc.

Answer explanation

Use the LCM to find a common denominator.

Fractions must have a common denominator to be added or subtracted

• 1

Answer explanation

Turn the mixed numbers into improper fractions.

Then find LCM to find a common denominator.

To add or subtract fractions you need a common denominator!