Estimating Products

1
Estimating Products

• SRB 225-228

2
Terms

• Products Answer to a multiplication problem.
• Factors The numbers multiplied to find a
  product.
• Magnitude Estimate An estimate to the answer of
  a problem it tells you whether the answer is the
  tenths, ones, tens, hundreds, thousands . . .

3
Steps

• Sample Problem 14 x 17 ?
• Round each of the factors so that there is one
  number followed by zero(es).
• Ex. 14 -gt 10
• x17 -gt 20
• Solve the estimate to find the place value of the
  product.
• 10 x 20 200 the answer is in the hundreds.

4
Additional Practice

1. 18 x 21
2. 7 x 6,245
3. 99 x 2
4. 22.6 x 28.9

• 20 x 20 400
• The answer is in the hundreds.
• 2. 10 x 6,000 60,000
• The answer is in the ten-thousands.
• 3. 100 x 1 100
• The answer is in the hundreds
• 4. 20 x 30 600
• The answer is in thehundreds