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Estimating to check reasonableness — Homework

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Estimating to check reasonableness — Homework

Estimate first by rounding, then find the exact product.

  1. 1.Estimate 68 x 22 by rounding, then find the exact answer.
  2. 2.Estimate 7 x 312 by rounding 312 to 300, then find the exact answer.
  3. 3.A friend computed 19 x 41 = 779. Use estimation to check: is this reasonable?
  4. 4.Estimate 53 x 48 by rounding to the nearest ten.
  5. 5.Explain why estimating before multiplying helps you catch mistakes.
🌲 Homeschool of the FutureFourth Grade · Math · week 16 homework