4th Grade Math (Grade 4) · Chapter 4 · Lesson 4.5 · Printable PDF

Estimating by Rounding Worksheet with Answer Key

6 problems on estimating products by rounding: rounding each factor to its leading place, checking whether an answer is reasonable, and word problems about boxes, supplies and bags of dog food. 2 pages, with a worked answer key.

6 problems2 pagesanswer key
Printable Estimating by rounding worksheet with answer key - 4th Grade Math (Grade 4) (Page 1 PDF preview)
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What's on the worksheet

  1. Estimate each product by rounding each factor to its leading place:
    7 × 4125 × 2,89363 × 4881 × 379 × 6,150
  2. Estimate each product and decide whether the student's answer is reasonable.
    8 × 527 = 4,21643 × 61 = 26,2306 × 3,912 = 2,34778 × 32 = 2,496
  3. Estimate the boxes in 3 moving trucks and say whether the exact number is more or less.
  4. Estimate the total cost of supplies and compare it with the 1,000 dollars to spend.
  5. Estimate the bags of dog food each store gets by rounding each factor.
  6. Find every two-digit number that could go in the box so rounding gives the estimate 2,400.

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The free lesson teaches it with worked examples and practice problems.

Estimating by rounding: the lesson ›