생활 속 계산 단원 종합

H.1Find each unit price. Write the better buy.

1. 1
   Which is the better buy for cereal: $10$ oz for $\text{\$}1.60$ or $16$ oz for $\text{\$}2.24$?
2. 2
   Which is the better buy for dog food: $19$ lb for $\text{\$}7.60$ or $30$ lb for $\text{\$}9.00$?
3. 3
   Which is the better buy for rice: $10$ lb for $\text{\$}3.40$ or $12$ lb for $\text{\$}4.44$?
4. 4
   Which is the better buy for dog food: $5$ lb for $\text{\$}3.00$ or $33$ lb for $\text{\$}17.16$?

H.2H.3Answer each question.

1. 5
   A bike that costs $\text{\$}223.00$ is on sale for $10\%$ off. How much do you save?
2. 6
   A bike that costs $\text{\$}214.00$ is on sale for $15\%$ off. How much do you save?
3. 7
   A board game that costs $\text{\$}50.00$ is on sale for $15\%$ off. What is the sale price?
4. 8
   A tent that costs $\text{\$}178.00$ is on sale for $30\%$ off. How much do you save?
5. 9
   With $5\%$ sales tax, a jacket costs $\text{\$}249.90$ in all. What was the price before tax?

H.3H.4Answer each question. (continued)

1. 10
   After a $50\%$ discount, a lamp costs $\text{\$}117.50$. What was the original price?
2. 11
   After a $10\%$ discount, a backpack costs $\text{\$}94.50$. What was the original price?
3. 12
   With $4\%$ sales tax, a jacket costs $\text{\$}243.36$ in all. What was the price before tax?
4. 13
   A dinner bill is $\text{\$}61.00$. The family leaves a tip of $18\%$. How much is the tip?
5. 14
   A skateboard costs $\text{\$}52.00$. The sales tax is $5\%$. How much is the tax?

H.4Answer each question. (continued)

1. 15
   A dinner bill is $\text{\$}86.00$. The family leaves a tip of $20\%$. What is the total with the tip?
2. 16
   A store buys a tent for $\text{\$}67.00$ and marks the price up $25\%$. What is the selling price?

H.5Use I = Prt to answer each question.

1. 17
   You put $\text{\$}650.00$ in a savings account that earns $6\%$ simple interest each year. How much money will be in the account after $3$ years?
2. 18
   You put $\text{\$}350.00$ in a savings account that earns $4\%$ simple interest each year. How much money will be in the account after $2$ years?
3. 19
   You put $\text{\$}700.00$ in a savings account that earns $3\%$ simple interest each year. How much money will be in the account after $4$ years?

H.5Use I = Prt to answer each question. (continued)

1. 20
   You put $\text{\$}350.00$ in a savings account that earns $6\%$ simple interest each year. How much money will be in the account after $3$ years?

H.1Unit Prices: Which Is the Better Buy?

1. 1$16$ oz for $\text{\$}2.24$ ($\text{\$}0.14$ per oz)
2. 2$30$ lb for $\text{\$}9.00$ ($\text{\$}0.30$ per lb)
3. 3$10$ lb for $\text{\$}3.40$ ($\text{\$}0.34$ per lb)
4. 4$33$ lb for $\text{\$}17.16$ ($\text{\$}0.52$ per lb)

H.2H.3H.4Answer each question.

1. 5$\text{\$}22.30$
2. 6$\text{\$}32.10$
3. 7$\text{\$}42.50$
4. 8$\text{\$}53.40$
5. 9$\text{\$}238.00$
6. 10$\text{\$}235.00$
7. 11$\text{\$}105.00$
8. 12$\text{\$}234.00$
9. 13$\text{\$}10.98$
10. 14$\text{\$}2.60$
11. 15$\text{\$}103.20$
12. 16$\text{\$}83.75$

H.5Simple Interest

1. 17$\text{\$}767.00$
2. 18$\text{\$}378.00$

H.5Simple Interest (continued)

1. 19$\text{\$}784.00$
2. 20$\text{\$}413.00$