Checkpoint: multiplying and dividing

You have 20 tiles and need three quarters of them. How many tiles is that?

• 5, because 20 ÷ 4 = 5
• 60, because 20 × 3 = 60
• 15

What is 2/3 × 3/4?

• 5/7
• 6/12, which is 1/2
• 6, from renaming both onto twelfths first

Is 1/2 × 1/2 bigger than 1/2, smaller than 1/2, or exactly 1/2?

• Smaller — it comes to 1/4
• Bigger, because a times sign makes numbers grow
• Exactly 1/2, because both numbers are the same

What is the reciprocal of 3/5?

• 1/3
• 8/15
• 5/3

Three quarters of a ribbon roll is left. Each trim takes an eighth of a roll. How many fit?

• 3
• 6
• 3/32