Notes Over 3 – 1 Round each number to the given place value. 1. Round 8.7398 to the nearest:7 a. tenth 8.7 Since the 3 in the hundredths place is lower.

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Presentation transcript:

Notes Over 3 – 1 Round each number to the given place value. 1. Round to the nearest:7 a. tenth 8.7 Since the 3 in the hundredths place is lower than 5, the 7 in the tenths place stays a 7. Drop everything past the 7.

Notes Over 3 – 1 Round each number to the given place value. 1. Round to the nearest: 8 a. tenth 8.7 Since the 3 in the hundredths place is lower than 5, the 7 in the tenths place stays a 7. Drop everything past the 7. b. integer 9 Since the 7 in the tenths place is higher than 5, the 8 in the ones place becomes a 9. Drop everything past the decimal.

Notes Over 3 – 1 Round each number to the given place value. 2. Round 7, to the nearest:0 a. hundred 7,100 Since the 9 in the tens place is higher than 5, the 0 in the hundreds place becomes a 1. Everything behind the 1 becomes a 0 up to the decimal.

Notes Over 3 – 1 Round each number to the given place value. 2. Round 7, to the nearest: 5 a. hundred 7,100 Since the 9 in the tens place is higher than 5, the 0 in the hundreds place becomes a 1. Everything behind the 1 becomes a 0 up to the decimal. b. tenth 7,098.6 Since the 6 in the hundredths place is higher than 5, the 5 in the tenths place becomes a 6. Drop everything past the 5.

Notes Over 3 – 1 3. Estimate by Rounding. a. $4.89 $9 $3.87  $5 $4  b  

Notes Over 3 – 1 4. Estimate by Front-End Estimation. a  4 9  b .3.8   =  = 10.1

Notes Over 3 – 1 5. Estimate by Clustering. a. $ $ $5.55 Since all of them are close to $5, you can multiply: $5 X 3 = $15 b Since all of them are close to 25, you can multiply: 25 X 5 = 125

Notes Over 3 – 2 1. Estimate by Rounding  6 5  = 30

Notes Over 3 – 2 2. Joshua bought 3 yards of fabric to make a dress. The fabric cost $5.65/yd. The clerk said his total was $14.95 before tax. Did the clerk make a mistake? Explain  6 3  =  = 15 It should have cost between $15 and $18.

Notes Over 3 – 2 Estimate by using Compatible Numbers = 19     = 21    

Notes Over 3 – = 5   5. Is 3.29 a reasonable quotient for ? Explain. It should have been closer to 5.

Page 125, 3 – 1 #1-13, even Page 129, 3 – 2 #1-8, even