Grade 4 students practice estimation precision by rounding decimals to the nearest tenth or whole number before adding. They compare estimated sums to actual sums and identify estimation errors. This skill builds number sense and helps students judge whether computed answers are reasonable per CCSS 4.NF.5 standard expectations. Students compare estimation strategies to actual computation in challenging Grade 4 multi-step contexts that build precision and reasoning skills.
Style:
Decimal Addition and Subtraction
Part A: Multiple Choice
Circle the best answer for each question.
1. Grade 4: Rounded to the nearest whole, 4.78 + 3.21 estimates to which sum?
A) 7
B) 8
C) 9
D) 10
2. Grade 4: The actual sum of 4.78 + 3.21 is closest to which value?
A) 7.99
B) 8.99
C) 7.09
D) 8.09
3. Grade 4: Rounded to the nearest tenth, 5.47 becomes which decimal?
A) 5.4
B) 5.5
C) 5.0
D) 6.0
4. Grade 4: A student estimated 6.82 + 2.15 as 10. Which whole-number estimate is more precise?
A) 8
B) 9
C) 10
D) 11
Part B: Fill in the Blank
Write the correct answer on each line.
1. Grade 4: Rounding 4.78 to the nearest whole gives 5.
2. Grade 4: Rounding 3.21 to the nearest whole gives 3.
3. Grade 4: The estimated sum of 4.78 + 3.21 to the nearest whole is 8.
4. Grade 4: The actual sum 4.78 + 3.21 equals 7.99.
5. Grade 4: Rounded to the nearest tenth, 5.47 becomes 5.5.
Decimal Addition and Subtraction
★ Part A: Multiple Choice
Circle the best answer for each question.
1. Grade 4: Rounded to the nearest whole, 4.78 + 3.21 estimates to which sum?
A) 7
B) 8
C) 9
D) 10
2. Grade 4: The actual sum of 4.78 + 3.21 is closest to which value?
A) 7.99
B) 8.99
C) 7.09
D) 8.09
3. Grade 4: Rounded to the nearest tenth, 5.47 becomes which decimal?
A) 5.4
B) 5.5
C) 5.0
D) 6.0
4. Grade 4: A student estimated 6.82 + 2.15 as 10. Which whole-number estimate is more precise?
A) 8
B) 9
C) 10
D) 11
★ Part B: Fill in the Blank
Write the correct answer on each line.
1) Grade 4: Rounding 4.78 to the nearest whole gives 5.
2) Grade 4: Rounding 3.21 to the nearest whole gives 3.
3) Grade 4: The estimated sum of 4.78 + 3.21 to the nearest whole is 8.
4) Grade 4: The actual sum 4.78 + 3.21 equals 7.99.
5) Grade 4: Rounded to the nearest tenth, 5.47 becomes 5.5.
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