Grade 3 · Math · Unit 2 of 14
Round & Count
Round, count and compare to 1000
What your child practises
Rounding numbers to the nearest ten or hundred, counting forward and back by 50s, 100s and 200s, and comparing and ordering numbers up to 1000.
Nunavut Curriculum approved guide: Alberta Mathematics K–9 (2007), Number · estimating quantities and sums and differences
How we explain it
Children can open this short lesson before they practise.
- To round to the nearest ten, look at the ones digit.
- If the ones digit is 5 or more, round up. If less than 5, round down.
- Skip count forward or back by 10s, 50s or 100s.
Example: Round 166 to the nearest ten. The ones digit is 6, which is 5 or more. Round up: 170. Answer: 170
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
Tap the numbers from smallest to biggest.
- 778
- 290
- 495
- 369
290 → 369 → 495 → 778
Hint: Compare the hundreds digit first.
Question 2
Which number is the greatest?
- 963
- 161
- 895
963
Hint: Compare the hundreds first, then the tens.
Question 3
Count back by 50s. What comes next?
350, 300, 250, 200,
- 140
- 150
- 147
150
Hint: Take away 50 each time.
Question 4
What number is missing?
150, 200, , 300, 350
- 248
- 252
- 250
250
Hint: Count by 50s.
Question 5
Round 519 to the nearest hundred.
- 520
- 500
- 600
500
Hint: Look at the tens digit. 5 or more, round up. Less than 5, round down.
Question 6
Round 263 to the nearest ten.
- 300
- 270
- 260
260
Hint: Look at the ones digit. 5 or more, round up. Less than 5, round down.