Cogito
Grade 2 Math · Chapter 7 · Lesson 4
Dollars and Cents
A hundred cents make a dollar.
10 problems · about 12 minutes · 2.MD.C.8
What this lesson teaches
The child writes amounts using the dollar and cent symbols and converts between them.
- One hundred cents make one dollar.
- Use ¢ under a dollar and $ at a dollar or more.
- 4 quarters, 10 dimes, or 100 pennies all make $1.
Warm-Up Review
From earlier lessons. Loosen up before the new work.
3 problemsReview — Counting Mixed Coins: 2 quarters and 3 dimes. How many cents?
Answer 80
Why 50 + 30 = 80¢.
Review — Counting Coins of One Kind: 5 dimes are worth how many cents?
Answer 50
Why 5 dimes is 50¢.
Review — Meet the Coins: How many cents is a dime worth?
Answer 10
Why A dime is 10¢.
Warm Up
Straightforward practice. Get the method working first.
3 problemsHow many quarters make one dollar?
Answer 4
Why 4 quarters is $1.
How many cents is $2?
Answer 200
Why $2 is 200 cents.
How many cents make a dollar?
Answer 100
Why A hundred of them.
Build It Up
The same ideas with more to keep track of.
1 problemHow many nickels make a dollar?
Answer 20
Why Skip count by 5 to 100.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
3 problemsWhich symbol fits 45 cents?
Answer 45¢
Why It is less than a dollar.
The Shop: How many dimes make one dollar?
Answer 10 dimes
Why 10 dimes is 100¢, which is $1.
Writing It Down: How many cents is $1 and 30 more cents?
Answer 130 cents
Why 100 + 30 = 130¢, written $1.30.