Ratio and Fraction concepts

A:B = 1:2 B:C = 1:4

What is the ratio of A:B:C?

What ratio/fraction concept is this?

• One item change

• Repeated Identity

• Equal fractions

• Constant total

X:Y = 2:3 Y:Z = 4:1

What is the ratio of X:Y:Z?

What ratio/fraction concept is this?

• Repeated Identity

• One item change

• Equal fraction

• Constant total

 $\frac{2}{5}\ of\ Mary's\ marbles\ is\ equal\ to\ \frac{1}{2}\ of\ Lucy's\ marbles.\$  

What is the ratio of Mary's marbles to Lucy's marbles?

What ratio/fraction concept is this?

• Repeated identity

• One item change

• Equal fractions

• Constant total

 $\frac{1}{3}\ of\ Tom's\ marbles\ is\ equal\ to\ \frac{1}{4}\ of\ Alt's\ marbles.$  What is the ratio of Tom's marbles to Ali's marbles?

What ratio/fraction concept is this?

• One item change

• Repeated identity

• Equal fractions

• Constant total

The ratio of apples to oranges is 7:3.

20 apples were sold.

The ratio of apples to oranges became 2:1.

What ratio/fraction concept is this?

• One item change

• Constant total

• Equal fractions

• Repeated identity

Ali and Bala had some money in the ratio of 5:3.

Bala and Charlie had some money in the ratio of 1:2.

What is the ratio of Ali's money to Bala's money to Charlie's money?

What ratio/fraction concept is this?

• Equal fraction

• Repeated identity

• One item change

• Constant total

Mary and Sally had some money in the ratio of 3:2.

Sally and Ann had some money in the ratio of 1:5.

What is the ratio of Mary's money to Sally's money to Ann's money?

What ratio/fraction concept is this?

• Repeated identity

• One item change

• Equal fractions

• Constant total

Ali and Bala had some stickers in the ratio of 5:3.

When Ali gave Bala 20 stickers, they both had the same number of stickers.

What ratio/fraction concept is this?

• Equal fraction

• Repeated identity

• One item change

• Constant total

The ratio of boys to girls in a class is 3:7.

When 15 girls entered the class, the ratio of boys to girls became 1:4.

What ratio/fraction concept is this?

• Repeated identity

• One item change

• Constant total

• Equal fractions

Sally and Mary had some buttons in the ratio of 4:5.

Mary then gave 30 buttons to Sally.

The ratio of Sally's buttons to Mary's buttons became 2:1.

What ratio/fraction concept is this?

• Repeated identity

• One item change

• Constant total

• Equal fractions