Estimating Sums and Differences for 4th Grade
This lesson covers estimating sums and differences for fourth-grade math. Use the examples and practice below to build confidence and skill.
DETAILED EXPLANATION
Estimating means finding a number close to the exact answer. Round each number to the nearest ten, hundred, or thousand, then add or subtract the rounded numbers. Estimates help check if an exact answer is reasonable.
WORKED EXAMPLES WITH STEP BY STEP SOLUTIONS
Example 1
Estimate 3,478 + 2,193 by rounding to the nearest hundred.
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Solutions:
Step 1: Apply the concept from the lesson above.
Step 2: Carry out the operation or reasoning.
Answer: 3,478 ≈ 3,500; 2,193 ≈ 2,200. 3,500 + 2,200 = 5,700.
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