Beat the clock rounding numbers to the nearest 10 or 100. Drag the correct answer into the slot before time runs out, chain correct answers for a streak, and try to beat your own best score.
EDUSAMBAM Editorial Team·Timed · Drag & Drop·Auto-Graded·Last updated: November 2026
Set Up Your Race
Pick what to round to, a number range, and a race length, then drag your way through as many questions as you can.
Round To
Number Range
Race Length
No best score yet for this setup — set the first one!
0
Correct
0
Streak
60
Seconds Left
On Fire!
NEAREST 10
Round 47 to the nearest 10
Drag the answer here
0
Correct Answers
New Personal Best!
0
Best Streak
0%
Accuracy
Rounding Numbers: A Quick Guide
Rounding replaces a number with a simpler number that is close to it. To round to the nearest 10, look at the ones digit. To round to the nearest 100, look at the tens digit. If that digit is 5 or more, round up. If it is 4 or less, round down.
Three worked examples
Example 1 · Nearest 10
Round 47. The ones digit is 7, which is 5 or more, so round up: 47 → 50. Round 63. The ones digit is 3, so round down: 63 → 60.
Example 2 · Nearest 100
Round 683. The tens digit is 8, so round up: 683 → 700. Round 420. The tens digit is 2, so round down: 420 → 400.
Example 3 · Halfway numbers
A number exactly halfway rounds up. 35 → 40, 250 → 300 and 5 → 10.
Three common mistakes
Looking at the wrong digit. For the nearest 10, look at the ones digit, not the tens digit. 683 rounded to the nearest 10 is 680, because the ones digit 3 is small.
Rounding 5 down. 45 rounds up to 50, not down to 40. The digit 5 always rounds up.
Forgetting the carry. 396 rounded to the nearest 10 is 400, because the ones digit 6 rounds up and 390 + 10 = 400.
How to use the race
Choose nearest 10, nearest 100 or mixed, then a number range and a race length.
Read the question, then drag the correct answer chip into the slot.
Rounding wrongly resets your streak, so check the digit before you drop.
Your best score for each setup is kept on this device. Race again to beat it.