Money — for parents
Money is the most natural place to practise grade-3 maths. Every shop receipt is a problem. Every coin purse is a count.
Why this matters
Money knits together:
- Adding/subtracting (totals, change).
- Multiplying (3 items at the same price).
- Decimals (12.50 €).
- Sense-checking ("does 30 € for a sandwich seem right?").
These together build financial literacy — a lifelong skill.
Most common mistakes
1. Wrong place value in decimals.The child writes 5 c as 0.5 € instead of 0.05 €.
Fix: always write two digits after the dot. "0.05" not "0.5". Read aloud: "zero point zero five euros = 5 cents". 2. Adding without lining up the dots.12.50 + 3.05 written as 12.50 + 3.5 → wrong.
Fix: always line up the decimal point. Or always convert both to cents first, add, then convert back. 3. Mixing cents and euros."5 € + 50 c = 55 €" (wrong — should be 5 € 50 c = 5.50 €).
Fix: before adding/subtracting, make units match. 4. Skipping zeros."3.5 €" written instead of "3.50 €". Same value but ambiguous.
Fix: with money, always two digits after the dot.Activities at home
- Real shopping. Hand the child a few euros at the supermarket. They pick a snack and work out their change.
- Pocket money log. Every week note pocket money in/out. End-of-month total.
- Pretend shop. Set up a "shop" with prices, give the child play money. Practise paying and change.
- Receipts. Take a real receipt, cover one item, ask the child to find what it cost.
When to ask for extra help
Talk to the teacher if your child still:
- can't tell whether 5 € or 50 c is more,
- always misplaces the decimal point,
- doesn't grasp change as "paid − price".
Most kids settle in 6–8 weeks of regular money exposure.
Summary for the parent
- 1 € = 100 cents.
- Two digits after the dot. Always.
- Real shopping is the best teacher.
- Watch for the "0.5 vs. 0.05" mistake.