This Grade 4 worksheet introduces estimating products using compatible numbers. Students round each two-digit factor to the nearest ten, then multiply to find a quick approximate answer. Through fill-in problems and a matching set, learners practice with examples like 32 x 19 and judge whether estimates are reasonable. The sheet builds mental-math fluency that supports later multi-digit multiplication work. Grade 4 students master rounding.
Style:
Estimation and Rounding
Part A: Fill in the Blank
Write the missing word or number on each line.
1. Round each factor to the nearest ten: 32 x 19 is approximately 600.
2. Estimate the product: 48 x 21 is approximately 1,000.
3. Estimate: 73 x 38 is approximately 2,800.
4. Estimate: 19 x 41 is approximately 800.
5. Estimate: 62 x 89 is approximately 5,400.
6. Estimate: 28 x 52 is approximately 1,500.
7. Estimate: 47 x 79 is approximately 4,000.
8. Estimate: 91 x 11 is approximately 900.
9. Estimate: 38 x 62 is approximately 2,400.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Estimate of 22 x 39
→ 800
1,000
Estimate of 51 x 18
→ 1,000
2,400
Estimate of 78 x 31
→ 2,400
800
Estimate of 43 x 58
→ 2,500
2,500
Estimation and Rounding
★ Part A: Fill in the Blank
Write the missing word or number on each line.
1) Round each factor to the nearest ten: 32 x 19 is approximately 600.
2) Estimate the product: 48 x 21 is approximately 1,000.
3) Estimate: 73 x 38 is approximately 2,800.
4) Estimate: 19 x 41 is approximately 800.
5) Estimate: 62 x 89 is approximately 5,400.
6) Estimate: 28 x 52 is approximately 1,500.
7) Estimate: 47 x 79 is approximately 4,000.
8) Estimate: 91 x 11 is approximately 900.
9) Estimate: 38 x 62 is approximately 2,400.
★ Part B: Matching
Match each item on the left to the correct answer on the right.
1) Match each item to its correct answer.
Estimate of 22 x 39
→ 800
1,000
Estimate of 51 x 18
→ 1,000
2,400
Estimate of 78 x 31
→ 2,400
800
Estimate of 43 x 58
→ 2,500
2,500
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10 Questions
10-15 minutes
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