Develop estimation skills to check work and solve problems mentally.
1. Find the place value you're rounding to 2. Look at the digit to the right 3. If it's 5 or more, round up 4. If it's less than 5, round down
12 min · read
Best for: Quick mental math Example: 487 + 521 ≈ 400 + 500 = 900
Best for: Division and multiplication Example: 48 ÷ 7 ≈ 49 ÷ 7 = 7
Best for: General accuracy Example: 23 × 18 ≈ 20 × 20 = 400
18 min · practice
Practice estimating in real-world scenarios.
10 min · quiz
Round 3,876 to the nearest hundred.
Estimate 48 × 22 using rounding.