Grade 2 learners check whether an exact answer is reasonable by directly comparing it to a rounded estimate. Nine fill-in questions and a matching activity show scenarios with small gaps that feel close and reasonable as well as big gaps that signal the need to check the work again carefully. This Grade 2 estimation worksheet turns reasonableness from a vague idea into a clear, countable comparison using concrete numbers and kid-friendly examples.
Style:
Estimation (Intro)
Part A: Fill in the Blank
Write the missing word or number on each line.
1. Estimate of 48 + 32 is 80. Exact is 80. This is reasonable.
2. Estimate of 29 + 41 is 70. Exact is 70, so the exact is equal the estimate.
3. Estimate of 63 - 18 is 40. Exact is 45. The exact is close to the estimate.
4. Estimate of 52 + 37 is 90. Exact is 89. Difference from estimate is 1.
5. If an estimate is 60 but the exact is 130, the exact is far from the estimate.
6. Close estimates help us catch mistakes in our math.
7. Estimate of 71 - 29 is 40. Exact 42 is near the estimate.
8. When the exact answer is very far from the estimate, we should check our work.
9. An estimate close to the exact means the exact is reasonable.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Est 80, exact 80
→ Exact matches estimate
Exact matches estimate
Est 40, exact 45
→ Close, off by 5
Close, off by 5
Est 90, exact 89
→ Very close, off by 1
Very close, off by 1
Est 60, exact 130
→ Far, check work
Far, check work
Estimation (Intro)
★ Part A: Fill in the Blank
Write the missing word or number on each line.
1) Estimate of 48 + 32 is 80. Exact is 80. This is reasonable.
2) Estimate of 29 + 41 is 70. Exact is 70, so the exact is equal the estimate.
3) Estimate of 63 - 18 is 40. Exact is 45. The exact is close to the estimate.
4) Estimate of 52 + 37 is 90. Exact is 89. Difference from estimate is 1.
5) If an estimate is 60 but the exact is 130, the exact is far from the estimate.
6) Close estimates help us catch mistakes in our math.
7) Estimate of 71 - 29 is 40. Exact 42 is near the estimate.
8) When the exact answer is very far from the estimate, we should check our work.
9) An estimate close to the exact means the exact is reasonable.
★ Part B: Matching
Match each item on the left to the correct answer on the right.
1) Match each item to its correct answer.
Est 80, exact 80
→ Exact matches estimate
Exact matches estimate
Est 40, exact 45
→ Close, off by 5
Close, off by 5
Est 90, exact 89
→ Very close, off by 1
Very close, off by 1
Est 60, exact 130
→ Far, check work
Far, check work
Ready to Practice?
Complete each section carefully.
10 Questions
10-15 minutes
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