1. 5 Minute Check Estimate and divide.Round to the nearest tenth, if necessary. 1. 10.22 ÷ 14 2. 59.84 ÷ 32 3. 751.2 ÷ 25 4. 6271 ÷ 4

2. 5 Minute Check Estimate and divide.Round to the nearest tenth, if necessary. 1. 10.22 ÷ 14

3. 5 Minute Check Estimate and divide.Round to the nearest tenth, if necessary. 1. 10.22 ÷ 14 ≈ 1 00.73 = 0.7 14)10.22 -98 42 -42 00

4. 5 Minute Check Estimate and divide.Round to the nearest tenth, if necessary. 2. 59.84 ÷ 32

5. 5 Minute Check Estimate and divide.Round to the nearest tenth, if necessary. 2. 59.84 ÷ 32 ≈ 2 01.87 = 1.9 32)59.84 -32 278 -256 224 -224

6. 5 Minute Check Estimate and divide.Round to the nearest tenth, if necessary. 3. 751.2 ÷ 25

7. 5 Minute Check Estimate and divide.Round to the nearest tenth, if necessary. 3. 751.2 ÷ 25 ≈ 30 030.04 = 30 25)751.20 -75 0120 -100

8. 5 Minute Check Estimate and divide.Round to the nearest tenth, if necessary. 4. 6271 ÷ 4

9. 5 Minute Check Estimate and divide.Round to the nearest tenth, if necessary. 4. 6271 ÷ 4 ≈ 1500 1567.75 = 1567.8 4)6271.00 -4 22 -20 27 -24 31 -28 30 -28 20

10. Flashcards

11. Thursday, Oct 8 Lesson 3.8 Divide Decimals by Decimals

12. Objective: To understand how to divide decimals by decimals.

13. Divide Decimals by Decimals When dividing a decimal by a decimal, change the divisor to a whole number. To do this, move the decimal in both the divisor and dividend to the right. Then divide as before.

14. Divide Decimals by Decimals

16. Find 1.71÷ 0.9

17. Divide Decimals by Decimals Find 1.71÷ 0.9 Divide a Decimal by a Decimal. Step 1 – Move the decimal point to the right in both numbers until the divisor is a whole number.

18. Divide Decimals by Decimals Find 1.7.1÷ 0.9. (if you move the decimal place over one spot, it’s just like multiplying both numbers by 10.) Divide a Decimal by a Decimal. Step 1 – Move the decimal point to the right in both numbers until the divisor is a whole number.

19. Divide Decimals by Decimals Find 1.7.1÷ 0.9. Divide a Decimal by a Decimal. Step 2 – Place the numbers in the dividing bracket.

20. Divide Decimals by Decimals Find 1.7.1÷ 0.9. 9)17.1 (You can drop the decimal point and zero in the divisor.) Divide a Decimal by a Decimal. Step 2 – Place the numbers in the dividing bracket.

21. Divide Decimals by Decimals Find 1.7.1÷ 0.9. 09)17.1 Divide a Decimal by a Decimal. Step 3 – Divide as before.

22. Divide Decimals by Decimals Find 1.7.1÷ 0.9. 01.9 9.)17.1 -0 17 -9 81 -81 Divide a Decimal by a Decimal. Step 3 – Divide as before.

23. Divide Decimals by Decimals Find 2.64÷ 0.6 Step 1 - ?

24. Divide Decimals by Decimals Find 2.6.4÷ 0.6. Step 2 - ?

25. Divide Decimals by Decimals Find 2.6.4÷ 0.6. 6)26.4 Step 3 - ?

26. Divide Decimals by Decimals Find 2.6.4 ÷ 0.6. = 4.4 04.4 6)26.4 -24 24 -24 0 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60

27. Divide Decimals by Decimals Find. 54.4 ÷ 1.7 Do this on your own

28. Divide Decimals by Decimals Find 54.4 ÷ 1.7 =32 032 17)544 -51 34 -34 0 On tonight’s homework, this is the work that needs to be shown.

29. Divide Decimals by Decimals Find 8.424 ÷ 0.36 Do this on your own

30. Divide Decimals by Decimals Find 8.424 ÷ 0.36 =23.4 023.4 36)842.4 -72 122 -108 144 -144 000 On tonight’s homework, this is the work that needs to be shown.

31. Divide Decimals by Decimals Find 52 ÷ 0.4 Do this on your own.

32. Divide Decimals by Decimals Find 52 ÷ 0.4 = 130 130 0.4)52 = 4)520 -4 12 -12 0 On tonight’s homework, this is the work that needs to be shown.

33. Divide Decimals by Decimals Find. 0.009 ÷ 0.18 Do this on your own.

34. Divide Decimals by Decimals Find 0.009 ÷ 0.18 = 0.05 000.05 18)000.90 -90 00

35. Divide Decimals by Decimals Find 11.2 ÷ 0.07 Do this on your own.

36. Divide Decimals by Decimals Find 11.2 ÷ 0.07 = 160 0160 7)1120 -7 42 -42 0

37. Divide Decimals by Decimals The average person’s stride length (the distance covered by one step) is about 2.5 ft long. How many steps would the average person take to travel 50 ft? Do this on your own.

38. Divide Decimals by Decimals The average person’s stride length (the distance covered by one step) is about 2.5 ft long. How many steps would the average person take to travel 50 ft? 20 steps 020 50 ÷ 2.5 = 25)500. -50 00

39. Divide Decimals by Decimals Frank made $ 98.20 last week. Erin made $51.20 last week. How many times more was Frank’s paycheck as Erin’s? Round to the nearest tenth. (Do this on your own)

40. Divide Decimals by Decimals Frank made $ 98.20 last week. Erin made $51.20 last week. How many times more was Frank’s paycheck as Erin’s? Round to the nearest tenth. Take out the ugly numbers and substitute friendly numbers. What if Frank made $100 and Erin made $50. How many more times was Frank’s paycheck? What operation did you use to solve?

41. Divide Decimals by Decimals Frank made $ 98.20 last week. Erin made $51.20 last week. How many times more was Frank’s paycheck as Erin’s? Round to the nearest tenth. 1.9 as much 0001.91 98.20 ÷ 1.20 = 5120)9820.00 -5120 47000 -46080 9200

42. Divide Decimals by Decimals Alaska has a coastline of about 6.64 thousand miles. Florida has a coastline of about 1.35 thousand miles. How many times more coastline does Alaska have than Florida? Round to the nearest tenth, if necessary. Do this on your own.

43. Divide Decimals by Decimals Alaska has a coastline of about 6.64 thousand miles. Florida has a coastline of about 1.35 thousand miles. How many times more coastline does Alaska have than Florida? Round to the nearest tenth, if necessary. Take out the ugly numbers and substitute friendly numbers. What if Alaska’s coastline was 7 thousand miles and Florida’s coastline was 1 thousand miles? How many more times is Alaska than Florida? What operation did you use to solve?

44. Divide Decimals by Decimals Alaska has a coastline of about 6.64 thousand miles. Florida has a coastline of about 1.35 thousand miles. How many times more coastline does Alaska have than Florida? Round to the nearest tenth, if necessary. 004.9 4.9 times 1.35)6.64 = 135)664.00 -540 1240 1215 250

45. Divide Decimals by Decimals Identify which expression does not belong. Explain. 49 ÷ 7 4.9 ÷ 7 0.49 ÷ 0.7 0.049 ÷ 0.07

46. Divide Decimals by Decimals Identify which expression does not belong. Explain. 49 ÷ 7 = 7 4.9 ÷ 7 = 0.7 0.49 ÷ 0.7 = 0.7 0.049 ÷ 0.07 = 0.7

47. Divide Decimals by Decimals Re-quiz after school on Friday @2:10. Remember – the higher of the two grades will be entered into ProgressBook.

48. Divide Decimals by Decimals Agenda Notes Homework – Homework Practice 3.8 Due Friday, Oct 9 Circle all answers and show all work. Chapter 3 Test -Tuesday, Oct 13 Accum Rev 3 due on Oct 13