Decimal Place Value and Estimation Test Friday 9

Decimal Place Value and Estimation Test Friday, 9 -19 -08

• You will need a pencil and a piece of paper before you begin this presentation.

Vocabulary: • • Clustering Indicated place value Rounding Estimate Difference Compatible numbers Nearest whole (tenth, hundredth …)

Estimate by rounding to the nearest whole number: • 4. 218 + 6. 321

Answer: • about 10 • Work: In order to round to the nearest whole number, look at the tenths place. (Rule 5 or more round up one, 4 or less stay the same. • 4. 218 + 6. 321 4 + 6=10

Estimate by rounding to the nearest tenth. • 4. 723 +. 888

Answer: • 5. 6 • Work: to round to the nearest tenth, look at the hundredths place. (Rule 5 or more up, 4 or less stay the same) • 4. 723 +. 888 4. 7 +. 9 = 5. 6

Use clustering to answer the following: • Three puppies have the following weights: 3. 11 pounds, 2. 98 pounds, and 2. 96 pounds. Use clustering to determine their approximate total weight.

Answer: • About 9 pounds • Work: (Clustering- round all numbers to the same value) • 3+3+3 = 9 (all the numbers are about 3)

Estimate the quotient by using compatible numbers. • 65. 23 divided by 8. 001

Answer: • 8 • Compatible Numbers: (make two numbers easier to divide. ) • 65. 23 divided by 8. 001 • 64 divided by 8 is 8

Review: • Write the following in word form: • 5. 35 • 6. 98

Answers: • Five and thirty five hundredths • Six and ninety eight hundredths

Write the following in Expanded form: • 4. 177

Answer for 4. 177 • 4+. 1+. 07+. 007 • Hint: Remember your chart 4. 1. 07. 007

Order the following numbers from least to greatest. • 5. 769, 5. 84, 5. 41, 5. 7694

Answer for: 5. 769, 5. 84, 5. 41, 5. 7694 • 5. 41, 5. 7694, 5. 84 • Hint: Remember to look at the whole number, then tenths, hundredths, thousandths and ten thousandths

• Do not forget to study your worksheets I gave you, and your flip book. • Do not forget to play Jeopardy. • Good Luck on your test.