SEAGReady
NumberP6 level24 questions in the full course

Round and Estimate with Whole NumbersSEAG Practice Questions

Rounding whole numbers to the nearest 10 or 100, and using those rounded values to estimate answers to calculations.

Where your child meets this in real life: Estimating shopping totals, checking calculator answers are sensible, quick mental approximations

What your child needs to know

SEAGReady breaks round and estimate with whole numbers into 3 steps, taught in order so each skill builds on the last.

  1. 1

    Round to Nearest 10

    Round whole numbers to the nearest 10 using the rounding rule

  2. 2

    Round to Nearest 100

    Round whole numbers to the nearest 100 by using the tens digit and the nearest hundreds on either side

  3. 3

    Estimate Calculations

    Use rounding to estimate answers to addition, subtraction, and multiplication problems

Try these SEAG-style questions

Three free sample questions from our round and estimate with whole numbers course. Every question comes with a full explanation, and hints that guide without giving the answer away.

Question 1Confidence builder

Cameron counted 67 sweets in a jar. Round 67 to the nearest 10.

A number line from 60 to 70 marks halfway at 65 and places 67 above the halfway point without showing a rounded result.
Answer choices for question 1
Question 2Confidence builder

A charity fun run had 3,456 runners take part this year. Round 3,456 to the nearest 100.

A number line from 3,400 to 3,500 marks halfway at 3,450 and places 3,456 above it without showing a rounded result.
Answer choices for question 2
Question 3Standard

Lena walked 387 metres on Monday and 214 metres on Tuesday. Estimate how many metres she walked altogether.

A place-value chart aligns Monday's 387 metres and Tuesday's 214 metres and highlights the tens digits used to round each distance to the nearest 100.
Answer choices for question 3

Try the lesson: Round to Nearest 10

This is the exact interactive worked example your child sees in SEAGReady. Step through it and watch the method build up.

Holly counted 67 books on the library shelf.

Round 67 to the nearest 10.

67 → ?

Find the neighbouring tens
1

Find the multiple of 10 on each side of 67

60 < 67 < 70

Step 1 of 4

Prefer to read? See every step written out

Holly counted 67 books on the library shelf.

Round 67 to the nearest 10.

  1. 1

    Find the neighbouring tens

    • Find the multiple of 10 on each side of 6760 < 67 < 70
    • Plot 67 between 60 and 7067 = 6 tens and 7 ones
  2. 2

    Compare with halfway

    • Mark the halfway point between 60 and 70Halfway = 65
    • 67 is above halfway, so it rounds to the higher ten67 → 70

67 rounded to the nearest 10 is 70.

The key insight: If the ones digit is 5 or more, round up. If it's less than 5, round down!

Common mix-up: 67 rounds to 60. The ones digit is 7, which is 5 or more, so we round UP to 70, not down to 60.

Mistakes to watch for

These are the misconceptions we see most often in round and estimate with whole numbers, including the ones our practice questions are specifically designed to catch.

  • Rounding down when the digit is 5 (should round up)
  • Looking at the wrong digit to decide rounding
  • Not understanding that estimates are approximate, not exact

Build these skills first

Struggling with round and estimate with whole numbers? The real gap is often in one of these earlier topics.

Identify Place Value of a Digit

More number practice

Read & Write Whole NumbersCompare Two Whole NumbersOrder a Set of Whole NumbersAddition Facts to 20Subtraction Facts Within 20Add 2-Digit Numbers (No Carry)
24 questions on this topic alone

Master round and estimate with whole numbers and everything it unlocks

SEAGReady finds the exact step where your child gets stuck, teaches it with worked examples like the one above, and brings it back for review so it sticks.

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