ratios

What is the ratio of squares to triangles?

• 6 : 3

• 3 : 9

• 3 : 6

What is the ratio of blue triangles to red squares?

• 4 : 3

• 3 : 4

• 4 : 7

There are 3 ways to write a ratio.
Which is NOT a way to write a ratio?

• 1 : 2

• 1 and 2

•  $\frac{1}{2}$  

• 1 to 2

What is a ratio?

• a box that plays music

• a comparison of 2 quantities

What number is missing?

• 12
• 3
• 11
• 13

If there are 5 boys and 7 girls, write the ratio of girls to boys.

• 5 to 7
• 7 to 5
• 5 to 12
• 7 to 12