Adding and Simplifying Fractions

What is the first thing you need to do when adding fractions that have different bottom numbers?

• Find a common top number.

• Find a common bottom number.

• Add the top numbers.

• Simplify the fractions.

How do you find a common bottom number for fractions?

• By adding the bottom numbers.

• By finding the smallest number that both bottom numbers can multiply into.

• By subtracting the bottom numbers.

• By dividing the bottom numbers.

When you change a fraction to have a new bottom number, what must you do to the top number to keep the fraction the same value?

• Add the same number to it.

• Subtract the same number from it.

• Multiply it by the same number.

• Divide it by a different number.

What is the sum of 4/9 + 1/3?

• 5/12

• 7/9

• 4/3

• 3/9

What is the sum of 3/10 + 2/6?

• 5/16

• 19/30

• 13/10

• 15/60