3rd grade · Math · Unit 8 of 12
Round & Count
Round, count and compare to 1000
What your child practices
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.
Minnesota K-12 Academic Standards benchmark: 3.3.5.4 · estimating sums and differences with place value
How we explain it
Children can open this short lesson before they practice.
- 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
Round & Count in Minnesota
In the Minnesota K-12 Academic Standards, this is unit 8 of 12 in 3rd grade Math, after Numbers to 10,000 and before Sorting Polygons.
Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.
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
Which number is the greatest?
- 282
- 624
- 165
624
Hint: Compare the hundreds first, then the tens.
Question 2
Count back by 100s. What comes next?
900, 800, 700, 600,
- 506
- 501
- 500
500
Hint: Take away 100 each time.
Question 3
Round 779 to the nearest ten.
- 770
- 800
- 780
780
Hint: Look at the ones digit. 5 or more, round up. Less than 5, round down.
Question 4
Round 955 to the nearest hundred.
- 960
- 900
- 1000
1000
Hint: Look at the tens digit. 5 or more, round up. Less than 5, round down.
Question 5
Round 708 to the nearest ten.
- 710
- 700
- 708
710
Hint: Look at the ones digit. 5 or more, round up. Less than 5, round down.
Question 6
Round 486 to the nearest hundred.
- 490
- 500
- 400
500
Hint: Look at the tens digit. 5 or more, round up. Less than 5, round down.