Rounding Radar Check Sheet
Reference & Check Sheet
Rounding to the Nearest Ten
Worked Example: Round 43 to the nearest ten
Name:
Date:
Step 1: Underline the digit in the tens place.
The tens digit is your rounding place.
43
Step 2: Find the surrounding landmarks.
Skip count by tens to find the ten before and after.
43 is between 40 and 50
Step 3: Label the number line with the landmarks and plot the number.
Use equal spaces, label all ten units from 40 to 50, and plot 43.
40 41 42 43 44 45 46 47 48 49 50
Step 4: Look at the digit to the right (the ones digit).
It determines distance from the lower landmark.
Rule Box
0–4: closer to lower → round down
5–9: closer to higher → round up
43 → 3 is in 0–4 range
(Round Down)
Step 5: Check with arrows to find the distance between each landmark.
Count the units to each landmark: 3 units to 40 vs. 7 units to 50.
40 43 45 50 3 units (Shorter!) 7 units
Step 6: Circle or write the landmark as your answer.
Closer landmark: 40
43 rounds to 40
Page 1: Rounding to the Nearest Ten Checklist • See Page 2 for Rounding to the Nearest Hundred
Reference & Check Sheet
Rounding to the Nearest Hundred
Worked Example: Round 952 to the nearest hundred
Name:
Date:
Step 1: Underline the digit in the hundreds place.
The hundreds digit is your rounding place.
952
Step 2: Find the surrounding landmarks.
Skip count by hundreds to find the hundred before and after.
952 is between 900 and 1,000
Step 3: Label the number line with the landmarks and plot the number.
Use equal units, label all ten tens from 900 to 1,000, and plot 952.
900 910 920 930 940 950 952 960 970 980 990 1,000
Step 4: Look at the digit to the right (the tens digit).
Look at the next lowest place value (tens place, not ones).
Rule Box
0–4: round down (hit the floor)
5–9: round up (bump it up)
952 → 5 is in 5–9 range
(Round Up)
Step 5: Check the distances with arrows.
Count the units to each landmark: 52 units to 900 vs. 48 units to 1,000.
900 952 1,000 52 units 48 units (Shorter!)
Step 6: Circle or write the landmark as your answer.
Closer landmark: 1,000
952 rounds to 1,000
Page 2: Rounding to the Nearest Hundred Checklist • 4th Grade Math Reference Guide
