K-5 friendly lesson
One small step at a time.Read the idea, try the activity, and celebrate each win as you go.
Round to the nearest ten or hundred using a number line
A number line helps you see which friendly number is closer. Rounding becomes visual and quick.
Do this: Read the concept below, then try the quiz or activity.
Lesson 4 of 220
Concept
Rounding on a number line: 1. Mark the two nearest tens or hundreds. 2. Place the number in between. 3. Check which end is closer.
Example: Round 67 to nearest ten - Between 60 and 70 - Midpoint is 65 - 67 is closer to 70 So 67 rounds to 70.
Example: Round 342 to nearest hundred - Between 300 and 400 - Midpoint is 350 - 342 is closer to 300 So 342 rounds to 300.
Try it
Round using a quick number line sketch: 1. 54 to nearest ten 2. 89 to nearest ten 3. 276 to nearest hundred 4. 651 to nearest hundred 5. 450 to nearest hundred (tie case)