Decimal Adventures Together
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Decimal Adventures Together
Page 1: Welcome, Mathematicians!
Child and grandparent mission: Explore decimals, solve puzzles, and talk about your thinking together.
Take turns reading each page. The child solves, and the grandparent asks, “How did you know?”
Our team names: ________________________________
Page 2: Learning Goals
By the end of this adventure, I can:
☐ Read and write decimals to hundredths.
☐ Use place value to compare and order decimals.
☐ Add and subtract decimals.
☐ Use decimals with Canadian money.
☐ Use multiplication and division to solve decimal problems.
Before we begin: What do you already know about decimals?
Page 3: Place-Value Park
A decimal point separates whole numbers from parts of a whole.
Example: In 4.27, 4 is in the ones place, 2 is in the tenths place, and 7 is in the hundredths place.
Draw a place-value chart together:
Thousands | Hundreds | Tens | Ones | Tenths | Hundredths
Page 4: Reading and Writing Decimals
Read 0.45 as “forty-five hundredths” or “zero and forty-five hundredths.”
Grandparent conversation: Where might you see decimals in everyday life?
Page 5: Decimal Detective
Use zeroes to help you see equal values: 0.5 = 0.50.
Partner game: Each player writes a decimal to hundredths. Compare your decimals using “greater than,” “less than,” or “equal to.”
Page 6: Comparing Decimals
Compare digits from left to right. If the tenths digits match, compare the hundredths digits.
Example: 0.58 > 0. forty? Compare carefully: 0.58 > 0. forty is not a decimal. Always write both numbers clearly.
a) 0.36 ____ 0.63
b) 1.50 ____ 1.5
c) 2.08 ____ 2.80
Page 7: Ordering Trail
Order decimals from least to greatest.
Grandparent challenge: Say four decimals aloud. The child writes them in order. Switch roles and try again.
Page 8: Adding Decimals
Line up the decimal points. Add ones with ones, tenths with tenths, and hundredths with hundredths.
Example: 1.25 + 0.40 = 1.65
a) 2.34 + 1.25 = __________
b) 0.70 + 0.18 = __________
Show your work:
Page 9: Subtracting Decimals
Line up the decimal points and regroup when needed.
Example: 3.00 − 1.45 = 1.55
a) 5.68 − 2.34 = __________
b) 4.00 − 0.75 = __________
Page 10: Money at the Market
Canadian money uses dollars and cents. One dollar equals 100 cents.
Example: $3.25 means 3 dollars and 25 cents.
Partner talk: Find three objects at home. Estimate and then record each cost using dollars and cents.
Page 11: Money Word Problems
Answer: ________________________________
Grandparent connection: Tell a story about saving money for something special.
Page 12: Multiplication Foundations
Multiplication can mean equal groups.
Example: 3 groups of $0.25 equals $0.75.
Use repeated addition, an array, or a number line.
Answer: ________________________________
Page 13: Multiplication Practice
Multiply the whole number by the decimal amount.
a) 3 × $1.20 = __________
b) 5 × $0.40 = __________
Explain one strategy:
Page 14: Sharing Fairly
Division can mean sharing equally or making equal groups.
Example: $2.00 shared equally among 4 people is $0.50 each.
Answer: ________________________________
Page 15: Decimal Division in Context
Use whole-number division facts to help with money and measurement.
Answer: ________________________________
Grandparent challenge: Make a fair-sharing problem using $4.00 and 4 people.
Page 16: Decimal Adventure Game
Race to 1.00: Take turns choosing a card or writing a decimal between 0.10 and 0.50. Add it to your running total. The first player to reach exactly 1.00 wins.
Record three turns below.
Talk together: What decimal would help you reach 1.00?
Page 17: Mixed Review
Complete each task.
1. Write 0.09 in words: ________________________________
2. Write >, <, or =: 0.6 ____ 0.60
3. Add: 1.25 + 2.30 = __________
4. Subtract: 6.00 − 2.45 = __________
Page 18: Final Team Assessment
Work independently first. Then discuss your strategies with your grandparent.
1. What is the value of 7 in 4. seventy? Write a complete decimal example: __________________
2. Order from greatest to least: 0.12, 1.02, 0.21, 1.20
Answer: __________________________________________
3. A snack costs $2.35 and a drink costs $1.40. What is the total?
Page 19: Reflection and Celebration
My strongest decimal skill is:
A strategy I will remember is:
Grandparent note: What did your mathematician do well?
Congratulations, decimal adventurers!
Page 20: Answer Key
1. 0.6, or six tenths.
2. 7.08.
3. Two and thirty hundredths, or two and three tenths.
4. 0.7, 0.70, and 0.700.
5. a) < b) = c) <
6. 0.05, 0.25, 0.50, 0.52.
7. a) 3.59 b) 0.88.
8. a) 3.34 b) 3.25.
9. $3.75.
10. $6.25.
Multiplication Foundations: 4 × $0.50 = $2.00.
Multiplication Practice: a) $3.60 b) $2.00.
Sharing Fairly: $0.60 each.
Decimal Division: 2 metres per piece.
Mixed Review: 0.09 is nine hundredths; 0.6 = 0.60; 1.25 + 2.30 = 3.55; 6.00 − 2.45 = 3.55.
Final Team Assessment: Answers may vary for question 1; question 2 is 1.20, 1.02, 0.21, 0.12; question 3 is $3.75.
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