MathIsimple
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Unit 1
Basic Level

Unit 1 Basic Worksheet

Practice three-digit addition, subtraction, and rounding

20 Questions•25-30 minutes

Instructions

  • Read each question carefully before answering
  • Take your time to think through each problem
  • You can change your answers before submitting
  • Click "Submit Answers" to see your results
  • Use hints if you need help understanding a question
Question 1
Multiple Choice

What is 234 + 156?

Question 2
Fill In Blank

456 - 189 = ___

💡 Hint

Borrow when needed.

Question 3
True False

47 rounds to 50 when rounding to the nearest 10.

Question 4
Multiple Choice

Round 678 to the nearest 100.

Question 5
Fill In Blank

589 + 276 = ___

💡 Hint

Add carefully.

Question 6
True False

When subtracting, always start with the ones place.

Question 7
Multiple Choice

What is 800 - 456?

Question 8
Fill In Blank

Round 245 to the nearest 100. ___

💡 Hint

Look at the tens digit.

Question 9
True False

Estimation gives exact answers.

Question 10
Multiple Choice

Estimate 47 + 32 by rounding to nearest 10.

Question 11
Fill In Blank

524 - 287 = ___

💡 Hint

Regroup carefully.

Question 12
True False

5 or more means round up.

Question 13
Multiple Choice

What is 412 + 399?

Question 14
Fill In Blank

Round 83 to the nearest 10. ___

💡 Hint

3 is less than 5.

Question 15
True False

You line up place values when adding.

Question 16
Multiple Choice

705 - 238 = ?

Question 17
Fill In Blank

Estimate 245 + 178 by rounding to 100. ___

💡 Hint

Round both numbers first.

Question 18
True False

When adding, you start with hundreds.

Question 19
Multiple Choice

Round 789 to the nearest 10.

Question 20
Fill In Blank

635 - 478 = ___

💡 Hint

Regroup multiple times.

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