Checkpoint: renaming, adding and taking away

You lay 11 eighth-pieces in a row. What is that amount as a mixed number?

• 11 3/8
• 1 3/8
• 3/8, because 11 − 8 leaves 3

Which bottom number can both 1/6 and 1/4 be renamed onto?

• 2, because 6 − 4 = 2
• 12
• 10, because 6 + 4 = 10

What is 1/2 + 1/3?

• 5/6
• 1/6
• 2/5

What is 5/6 − 1/2?

• 4/4, which is one whole
• 2/6, which is 1/3
• 4/6

What is 3 1/4 − 1 1/2?

• 2 3/4
• 2 1/4
• 1 3/4