Primary 1 maths · Measurement & time · About 8 minutes
Count dollars up to 100 dollars
Read every value and its unit. Keep dollars and cents distinct until you rename them.
Start the interactive lesson →Open practice activity
What you will learn
- Count dollars up to 100 dollars
Models used: number sentences, stories, diagrams.
Before you start
Read the value on each note
This note is worth two dollars.
These are model notes. Read the dollar value printed on each note.
This note is worth two dollars.
Different coins can have different values. One dollar and one hundred cents are two names for the same amount.
These are model notes. Read the dollar value printed on each note.
Add a five-dollar note. Two dollars and five dollars make seven dollars.
$2 + $5 = $7
These are model notes. Read the dollar value printed on each note.
A ten-dollar note adds ten more dollars. Count the printed values, not the number of notes.
$2 + $5 + $10 = $17
What did the picture help us see?
A ten-dollar note adds ten more dollars. Count the printed values, not the number of notes.
Worked example: A new example, together
Count these dollar notes: 10 + 10 + 5.
These are model notes. Read the dollar value printed on each note.
Read every value and its unit. Keep dollars and cents distinct until you rename them.
The value of money is the sum of the printed amounts.
These are model notes. Read the dollar value printed on each note.
Read the value printed on each note or coin.
Count these dollar notes: 10 + 10 + 5.
25 dollars
These are model notes. Read the dollar value printed on each note.
Read the value printed on each note or coin.
These are model notes. Read the dollar value printed on each note.
Add the values: 10 + 10 + 5.
These are model notes. Read the dollar value printed on each note.
The total is 25 dollars.
These are model notes. Read the dollar value printed on each note.
Check the result against the question we started with.
Regrouping the same money keeps the total 25 dollars.
We found 25 dollars. The value of money is the sum of the printed amounts.
Common mistakes to discuss
- Counting coins instead of values. Each coin carries its own value. Four coins can be 70 cents when they are 50, 10, 5 and 5.
Check your understanding
- Count dollars up to 100 dollars
- compare, combine or rename money while preserving its value
- check the answer against the original quantities and units
Explain your reasoning to an adult, then try a fresh question in the interactive lesson. A result from one attempt is not proof of lasting mastery.
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