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Worksheet: Estimating Multiplication Products

Q1:

We can estimate products by rounding each number to its greatest place value as in the example.

Use this method to estimate the following products.

Estimate 8 6 × 0 . 3 2 8 .

Estimate 7 1 7 × 0 . 9 0 1 .

Q2:

Estimate 7 7 1 2 × 8 2 9 .

  • A16
  • B72
  • C56
  • D64

Q3:

Which of the following is closest to 5 × 1 0 3 × 6 0 ? Solve without using a calculator.

  • A 3 000
  • B 300 000
  • C 40 000
  • D 30 000

Q4:

Use your rounding skills to estimate

  • A 2 0 0 0 0
  • B 1 8 0 0 0
  • C 1 2 0 0 0
  • D 1 6 0 0 0
  • E 1 6 0 0

Use the standard algorithm to find the exact answer.

Hint: Use your estimate to check your answer.

Q5:

Estimate 5 7 × 6 2 .

  • A10
  • B9
  • C50
  • D45
  • E40

Q6:

Consider the product 8 7 2 × 0 . 0 8 2 .

Estimate the product by rounding each number to its greatest place value.

Calculate the product.