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Vocabulary Reminder:

Divide Decimals. Vocabulary Reminder:. Dividend Divisor Quotient. 8. 16 ÷ 2 = 8. 2. 16. 16. = 8. 2. NOTES: Dividing Decimals. No Decimal in the Divisor: Bring inside decimal UP to the Quotient Divide! Decimal in the Divisor: Move Divisor’s decimal OVER

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Vocabulary Reminder:

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  1. Divide Decimals • Vocabulary Reminder: • Dividend • Divisor • Quotient 8 16 ÷ 2 = 8 2 16 16 = 8 2

  2. NOTES:Dividing Decimals No Decimal in the Divisor: • Bring inside decimal UP to the Quotient • Divide! Decimal in the Divisor: • Move Divisor’s decimal OVER • Move Dividend’s decimal OVER • Bring the decimal UP to the Quotient • Divide!

  3. EXAMPLES:Dividing Decimals • 7.6 ÷ 4 (round to tenths place) 1 9 1.9 4 7.6 4 - Bring decimal UP! 3 6 3 6 - 0

  4. EXAMPLES:Dividing Decimals 2) 12.9 ÷ 6 (round to tenths place) 2 1 5 2.2 6 12.9 0 12 - Add a zero and keep going! NO remainders! 0 9 6 - 3 0 30 - 0

  5. EXAMPLES:Dividing Decimals 3) 6.49 ÷ 2.2 (round to tenths place) 2 9 5 3 2.2 6.49 0 44 - Add a zero and keep going! NO remainders! 20 9 198 - 11 0 110 - 0

  6. EXAMPLES:Dividing Decimals 3) 128.8 ÷ 0.92 (round to tenths place) 1 4 0 140 .92 128.80 92 - 36 8 Don’t forget the zero! 368 - 0 0

  7. EXAMPLES:Dividing Decimals 5) Mrs. Nicholas bought 2.5 pounds of hamburger for $5.08. How much did she pay per pound? Round to the nearest hundredth. 2 0 3 2 $2.03 2.5 5.08 0 0 50 - Add a zero and keep going! NO remainders! 0 8 0 - 8 0 75 - 5 0 50 - 0

  8. Lesson Reading Guide Luis has two plastic straws that each need to be cut into 3 pieces. 4 4 12 in 1.2 in 3 1.2 3 12 1.2 - 12 - 0 0 • Compare the digits of both problems. • Compare the steps of division process. • Compare the place value of quotient. • How can you check your answer? • When dividing 2 decimals, what do you do first? • When will you divide decimals in the real world?

  9. Lesson Reading Guide 5) When dividing 2 decimals, what do you do first? 6) When will you divide decimals in the real world?

  10. Check for Understanding Tell whether each statement is sometimes, always, or never true. Give an example or counterexample for each. Division is commutative. To divide decimals, simply multiply the divisor and dividend by the same power of 10 before dividing. Never; 3.5 ÷ 0.5 = 7.0 but 0.5 ÷ 3.5 ≈ 0.14 Always: 14.4 ÷ 1.2 -> When you move the decimals, you are multiplying both numbers by 10 -> 144 ÷ 12

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