Rounding & Estimation

See on a number line why numbers round up or down

Grades 3–5

Rounding & Estimation Engine 🎯

Number (0–9999)

Round to nearest

Number Line

342rounds to340

342 is 2 away from 340 and 8 away from 350. Since it's closer to 340, it rounds DOWN to 340.

✓ Winner (rounds down)

340

2 away from 342

✗ Loser (rounds up)

350

8 away from 342

The Golden Rule 📏

If the digit in the place below is0–4→ round DOWN.If it's5–9→ round UP.

0123456789