Page 177 - NUMINO TG_6A
P. 177
Activity 3 Buying the Items
jOb ective Compare the unit rate of different prices.
1. Textbook Instructions Activity 3 Buying the Items
Supermarkets offer a wide variety of items and This activity allows students to compare different rates depending on what they need to purchase.
prices. Determining the best deal can be
challenging. Generally, the greater the amount 1 . Find the market that offers the better price using the unit rate.
being sold the better the unit price, but this is
not always the case. In this activity, students Let’s Play
will learn how to compare different rates
depending on what they need to purchase. 1. Play with a partner.
2. Play rock, paper, scissors with your partner.
3. The winner chooses Market A or B, and the looser gets the other
market.
4. Find the unit rate of eggs, milk, and cherry tomatoes.
5. Compare the unit rates of Market A to B. The person with the smaller
unit rate wins.
1. Have students pair up and play a game Example Carrots
about unit price. Market A Market B
Have students play rock, paper, scissors.
The winner chooses market A or B, and
then calculates the unit price for the
corresponding item.
The other student calculates the unit price
for each item in the other market.
Example: Determine the unit price of carrots 2 carrots for $3 4 carrots for $5
in markets A and B. Determine the unit rate unit rate = $3 unit rate = $5
2 4
( carrots ). = $1.5 = $1.25
dollar
Step 1: Set up a ratio ( 3 , 5 ).
2 4
Step 2: Simplify to a decimal (1.5, 1.25).
Step 3: Compare the unit rates; lower is The price of 1 carrot is $0.25 cheaper at market B.
cheaper.
Market B is better. 98
2. Build Understanding
Many people have trouble determining unit rates at supermarkets, and end up paying more than they need
to. While some of the unit rates may be challenging without pencil and paper, you should be able to
calculate most of them in your head. In some countries such as the United States, supermarkets must
provide unit rates for their items. The next time you are at the supermarket try to calculate the unit rate of
5 items.
160 NUMINO Teacher s Guide
jOb ective Compare the unit rate of different prices.
1. Textbook Instructions Activity 3 Buying the Items
Supermarkets offer a wide variety of items and This activity allows students to compare different rates depending on what they need to purchase.
prices. Determining the best deal can be
challenging. Generally, the greater the amount 1 . Find the market that offers the better price using the unit rate.
being sold the better the unit price, but this is
not always the case. In this activity, students Let’s Play
will learn how to compare different rates
depending on what they need to purchase. 1. Play with a partner.
2. Play rock, paper, scissors with your partner.
3. The winner chooses Market A or B, and the looser gets the other
market.
4. Find the unit rate of eggs, milk, and cherry tomatoes.
5. Compare the unit rates of Market A to B. The person with the smaller
unit rate wins.
1. Have students pair up and play a game Example Carrots
about unit price. Market A Market B
Have students play rock, paper, scissors.
The winner chooses market A or B, and
then calculates the unit price for the
corresponding item.
The other student calculates the unit price
for each item in the other market.
Example: Determine the unit price of carrots 2 carrots for $3 4 carrots for $5
in markets A and B. Determine the unit rate unit rate = $3 unit rate = $5
2 4
( carrots ). = $1.5 = $1.25
dollar
Step 1: Set up a ratio ( 3 , 5 ).
2 4
Step 2: Simplify to a decimal (1.5, 1.25).
Step 3: Compare the unit rates; lower is The price of 1 carrot is $0.25 cheaper at market B.
cheaper.
Market B is better. 98
2. Build Understanding
Many people have trouble determining unit rates at supermarkets, and end up paying more than they need
to. While some of the unit rates may be challenging without pencil and paper, you should be able to
calculate most of them in your head. In some countries such as the United States, supermarkets must
provide unit rates for their items. The next time you are at the supermarket try to calculate the unit rate of
5 items.
160 NUMINO Teacher s Guide
