This Grade 4 worksheet asks students to judge whether given answers are reasonable using estimation. Learners round addends, factors, or dividends, compute a quick mental estimate, and compare it to a stated answer. Multiple-choice and fill-in problems guide students through error analysis. The sheet builds critical thinking and number sense, important for catching mistakes in everyday Grade 4 computations. Grade 4 students master rounding.
Style:
Estimation and Rounding
Part A: Multiple Choice
Circle the best answer for each question.
1. Is 12,346 a reasonable answer for 5,890 + 3,456?
A) Yes, because the estimate is about 9,300
B) No, because the estimate is about 9,300 and 12,346 is much larger
C) Yes, because both are close
D) No, because the estimate is about 15,000
2. Is 4,210 a reasonable answer for 8,732 - 4,567?
A) No, the estimate is about 9,000
B) Yes, the estimate is about 4,200
C) No, the estimate is about 5,000
D) Yes, the estimate is about 13,000
3. Is 1,800 a reasonable estimate for 32 x 58?
A) Yes, because 30 x 60 = 1,800
B) No, because 30 x 50 = 1,500
C) Yes, because 40 x 50 = 2,000
D) No, because 32 x 58 = 100
4. A student says 487 divided by 7 is about 700. Is that reasonable?
A) Yes, because 490 divided by 7 is 70
B) No, because 490 divided by 7 is 70, not 700
C) Yes, because 487 is close to 700
D) No, because the answer is exactly 7
Part B: Fill in the Blank
Write the correct answer on each line.
1. Estimate the sum 4,892 + 3,107 by rounding each addend to the nearest thousand. The estimate is 8,000.
2. Estimate 9,431 - 2,876 by rounding each number to the nearest thousand. The estimate is 6,000.
3. If a student answers 6,890 + 2,145 = 9,035, the estimate using thousands is about 9,000.
4. If 47 x 22 has a true product of 1,034, the compatible-number estimate is 1,000.
5. If 396 divided by 4 has the answer 99, a reasonable compatible-number estimate is 100.
Estimation and Rounding
★ Part A: Multiple Choice
Circle the best answer for each question.
1. Is 12,346 a reasonable answer for 5,890 + 3,456?
A) Yes, because the estimate is about 9,300
B) No, because the estimate is about 9,300 and 12,346 is much larger
C) Yes, because both are close
D) No, because the estimate is about 15,000
2. Is 4,210 a reasonable answer for 8,732 - 4,567?
A) No, the estimate is about 9,000
B) Yes, the estimate is about 4,200
C) No, the estimate is about 5,000
D) Yes, the estimate is about 13,000
3. Is 1,800 a reasonable estimate for 32 x 58?
A) Yes, because 30 x 60 = 1,800
B) No, because 30 x 50 = 1,500
C) Yes, because 40 x 50 = 2,000
D) No, because 32 x 58 = 100
4. A student says 487 divided by 7 is about 700. Is that reasonable?
A) Yes, because 490 divided by 7 is 70
B) No, because 490 divided by 7 is 70, not 700
C) Yes, because 487 is close to 700
D) No, because the answer is exactly 7
★ Part B: Fill in the Blank
Write the correct answer on each line.
1) Estimate the sum 4,892 + 3,107 by rounding each addend to the nearest thousand. The estimate is 8,000.
2) Estimate 9,431 - 2,876 by rounding each number to the nearest thousand. The estimate is 6,000.
3) If a student answers 6,890 + 2,145 = 9,035, the estimate using thousands is about 9,000.
4) If 47 x 22 has a true product of 1,034, the compatible-number estimate is 1,000.
5) If 396 divided by 4 has the answer 99, a reasonable compatible-number estimate is 100.
Ready to Practice?
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9 Questions
12-18 minutes
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