An estimate is a smart, quick guess that is close enough — you don't need the exact answer.
If a jar has 38 sweets and another has 61, about how many altogether?
38 ≈ 40 and 61 ≈ 60, so about 100! 🍬
The squiggly sign ≈ means "about equal to". Let's learn the trick!
Where does 47 sit? Tap the ten it is closest to on the number line.
47 is past the middle (45) — so which ten is nearer?
Look only at the ones digit:
0 1 2 3 4 → round DOWN (keep the ten)
5 6 7 8 9 → round UP (next ten)
Tap each card to check your thinking:
Tap a number, then tap the box it rounds to. Use the ones digit!
Tip: ones digit 0–4 goes down, 5–9 goes up.
Round each price to the nearest 10, then add. Pick the best estimate.
So 30 + 20 + 20 = ? About how much?
An estimate helps you check you have enough money!
Estimating is faster than exact maths and great for everyday checks.
You calculate 312 + 489 and get 1,201.
Estimate: 300 + 500 = 800. Tap below: is 1,201 sensible?
✅ An estimate is a close, quick answer (sign: ≈).
✅ Round to the nearest 10: ones 0–4 down, 5–9 up.
✅ Round first, then add to estimate a total.
✅ Use estimates to sense-check your answers.
Next time you go shopping, try estimating the total in your head — you've got this! 💪