Grade 2 | MATHEMATICS
WEEK 12 • STUDENT TEXTBOOK • DAYS 56–60
Read each lesson with a parent or teacher and study the worked example. Then answer the questions for that day in the Week 12 Practice Workbook.
Week 12 Student Textbook | Week 12 Practice Workbook | Week 12 Teacher Guide | Week 11 Student Textbook | Grade 2 index
Day 56: Coins and Their Values
Coins are money. A penny is worth 1 cent, written 1¢. A nickel is worth 5¢. A dime is worth 10¢. A quarter is worth 25¢. One dollar, written $1, is worth 100¢.
The size of a coin does not tell its value. A dime is the smallest coin, but it is worth more than a penny or a nickel. Learn each coin by its look and its name, then remember its value.
Worked example: How many pennies have the same value as one nickel?
- A nickel is worth 5¢.
- Each penny is worth 1¢.
- Count pennies to 5¢: 1, 2, 3, 4, 5.
Worked answer: 5 pennies.
Day 57: Count a Collection of Coins
To find the value of a group of coins, start with the coin worth the most. Then count on.
Count quarters by 25s, dimes by 10s, nickels by 5s and pennies by 1s. For 3 dimes and 2 pennies, count 10, 20, 30, 31, 32. The coins are worth 32¢.
Worked example: Find the value of 1 quarter, 2 dimes and 1 penny.
- Start with the quarter: 25.
- Count on the dimes: 35, 45.
- Count on the penny: 46.
Worked answer: 46¢.
Day 58: Compare Amounts of Money
To compare two groups of coins, find the value of each group first. Then compare the two numbers of cents with greater than, less than or equal to.
More coins do not always mean more money. 1 quarter is worth 25¢, but 4 nickels are worth only 20¢.
Worked example: Which is worth more: 2 dimes or 3 nickels?
- 2 dimes: 10, 20. That is 20¢.
- 3 nickels: 5, 10, 15. That is 15¢.
- 20¢ is greater than 15¢.
Worked answer: 2 dimes are worth more. 20¢ is greater than 15¢.
Day 59: Make Equal Amounts and Solve Money Problems
The same amount of money can be made with different coins. 30¢ can be 3 dimes, or 1 quarter and 1 nickel, or 6 nickels.
In a money word problem, find what you know and what you need. Add when money is put together. Subtract when money is spent or taken away. Write the answer with the cent sign.
Worked example: Show 30¢ in two different ways.
- Count dimes: 10, 20, 30. That is 3 dimes.
- Start with a quarter, 25, then a nickel, 30. That is 1 quarter and 1 nickel.
Worked answer: 3 dimes, or 1 quarter and 1 nickel.
Day 60: Independent Check: Money
Today you will answer on your own.
Use what you learned this week: name coins and their values, count from the coin worth the most, compare amounts, and solve word problems with the cent sign.
Worked example: Find the value of 1 quarter and 1 nickel.
- Start with the quarter: 25.
- Count on the nickel: 30.
Worked answer: 30¢.
Week 12 Student Textbook | Week 12 Practice Workbook | Week 12 Teacher Guide | Week 11 Student Textbook | Grade 2 index
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