Lesson 10: Practice Problems

Problem 1

What percentage of a dollar is the value of each coin combination?

  1. 4 dimes

  2. 1 nickel and 3 pennies

  3. 5 quarters and 1 dime

Problem 2

  1. List three different combinations of coins, each with a value of 30% of a dollar.

  2. List two different combinations of coins, each with a value of 140% of a dollar.

Problem 3

The United States government used to make coins of many different values. For each coin, state its worth as a percentage of $1.

  1. cent

    image of coin labeled half cent

  2. 3 cents

    image of coin with the roman numeral III

  3. 20 cents

    image of coin labeled twenty cents

  4. image of coin labeled 2 1/2 dollars

  5. $5

    image of coin labeled 5 dollars

Problem 4

Complete the double number to line show percentages of $50.

A double number line of money (dollars) and percentages. Each have 7 tick and blanks to fill in at the 3rd, 4th, and 7th tick marks. Money counts by 12.50 and percentages by 25%.

Problem 5 From Unit 3 Lesson 9

Elena bought 8 tokens for $4.40. At this rate:

  1. How many tokens could she buy with $6.05?

  2. How much do 19 tokens cost?

Problem 6 From Unit 3 Lesson 8

A snail travels 10 cm in 4 minutes. At this rate:

  1. How long will it take the snail to travel 24 cm?

  2. How far does the snail travel in 6 minutes?

Problem 7 From Unit 3 Lesson 7

3 tacos cost $18. Complete the table to show the cost of 4, 5, and 6 tacos at the same rate.

  1. 3 tacos cuestan $18. Completa la tabla para mostrar el costo de 4, 5 y 6 tacos a la misma tasa.

    number of tacos

    cost in dollars

    rate in dollars per taco

  2. If you buy tacos for dollars, what is the unit rate?