Brain Warm-Up  Round the following decimals to the specified place value. Nearest tenth 1.) 5.921 2.) 9.243.) 0.823 Nearest hundredth 4.) 6.824 5.) 0.9726.)

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Presentation transcript:

Brain Warm-Up  Round the following decimals to the specified place value. Nearest tenth 1.) ) ) Nearest hundredth 4.) ) ) 3.1

Estimating Decimal Products and Quotients November 4, 2011 Ms. Latimer

Vocabulary Compatible – What are reasons that would cause someone to estimate instead of just solving a problem?

To estimate products or quotients, we will use rounding.  Examples: 1.) Estimate 38.9 x 11 2.) Estimate ÷ 21 3.) Would an answer of 12.3 be a reasonable answer for #2?

Skill Practice: Skill Practice: 1.) Estimate x 48 2.) Estimate ÷ 9 3.) Use estimation to check that the calculation 29 x = 4,402.2 is reasonable. 4.) Use estimation to check that the calculation ÷ 8 = is reasonable.

Practice  PB pg 47 #5-13 –Make an estimate ONLY!!!!!  PB pg 49 #7-18 –Make an estimate ONLY!!!!!

Application:  Maria worked quickly through her chapter test and wrote down as the answer to her last problem which was x 6. Estimate (mentally) to see if you think that her answer is reasonable. Explain your decision.

Lata Gata Agendas: Come up with 3 ways that you would use estimation of decimals (multiplying and dividing) in real life. Exit Slip