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Lesson 3.2: Estimating Decimal Products and Quotients

Lesson 3.2: Estimating Decimal Products and Quotients. For products…. Round to a whole number and use mental math to solve. Example: 6.43 x 4.75. Try some. 6.3 · 9.2 = 3.29 · 58 = 6 packs of pencils for $2.89 each. For quotients. We need to round to “compatible numbers.”

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Lesson 3.2: Estimating Decimal Products and Quotients

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  1. Lesson 3.2: Estimating Decimal Products and Quotients

  2. For products… • Round to a whole number and use mental math to solve. • Example: 6.43 x 4.75

  3. Try some. • 6.3 · 9.2 = • 3.29 · 58 = • 6 packs of pencils for $2.89 each

  4. For quotients • We need to round to “compatible numbers.” • This means they are easy to divide mentally. • Round the number after the division sign first. • Example: 11.95 2.2

  5. Try some.

  6. Tonight’s Assignment • 1-24 even, 25-27, all • PM 3.2

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