Third graders get a friendly first pass at rounding two-digit numbers to the nearest ten. Part A hands them three buggy sentences to fix, including the tricky claim that 53 rounds to 60 and the classic 45 case where the ones digit is exactly 5. Part B asks them to fill in answers for 41, 87, 58, and 72, while Part C tests their thinking with true-or-false statements about 33, 76, and the rule for ones digits of 4.
Working through these problems builds the digit-check habit that makes mental math feel automatic.
Style:
Rounding to Nearest 10 and 100
Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1. Fix the sentence:
53 rounded to the nearest ten is 60.
Rewrite: 53 rounded to the nearest ten is 50 because 3 is less than 5 so we round down.
2. Fix the sentence:
66 rounded to the nearest ten is 60.
Rewrite: 66 rounded to the nearest ten is 70 because 6 is 5 or greater so we round up.
3. Fix the sentence:
45 rounded to the nearest ten is 40.
Rewrite: 45 rounded to the nearest ten is 50 because when the digit is exactly 5 we round up.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. 41 rounded to the nearest ten is 40.
2. 87 rounded to the nearest ten is 90.
3. 58 rounded to the nearest ten is 60.
4. 72 rounded to the nearest ten is 70.
Part C: True or False?
Read each statement. Circle True or False.
1. 33 rounded to the nearest ten is 30.
True False
2. 76 rounded to the nearest ten is 70.
True False
3. A number with a ones digit of 4 always rounds down to the nearest ten.
True False
Rounding to Nearest 10 and 100
★ Part A: Fix the Sentence
Each sentence has an error. Rewrite it correctly on the line.
1) Fix the sentence:
53 rounded to the nearest ten is 60.
Rewrite: 53 rounded to the nearest ten is 50 because 3 is less than 5 so we round down.
2) Fix the sentence:
66 rounded to the nearest ten is 60.
Rewrite: 66 rounded to the nearest ten is 70 because 6 is 5 or greater so we round up.
3) Fix the sentence:
45 rounded to the nearest ten is 40.
Rewrite: 45 rounded to the nearest ten is 50 because when the digit is exactly 5 we round up.
★ Part B: Fill in the Blank
Write the missing word or number on each line.
1) 41 rounded to the nearest ten is 40.
2) 87 rounded to the nearest ten is 90.
3) 58 rounded to the nearest ten is 60.
4) 72 rounded to the nearest ten is 70.
★ Part C: True or False?
Read each statement. Circle True or False.
1) 33 rounded to the nearest ten is 30.
True
False
2) 76 rounded to the nearest ten is 70.
True
False
3) A number with a ones digit of 4 always rounds down to the nearest ten.
True
False
Ready to Practice?
Complete each section carefully.
10 Questions
15-20 minutes
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