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Module 2 Lesson 25

Module 2 Lesson 25. Use basic facts to approximate decimal quotients with two-digit divisors, reasoning about the placement of the decimal point. Common Core Standards.

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Module 2 Lesson 25

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  1. Module 2 Lesson 25 • Use basic facts to approximate decimal quotients with two-digit divisors, reasoning about the placement of the decimal point.

  2. Common Core Standards • 5.NBT.7 Add, subtract, multiply, and divide decimals to hundredths, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.

  3. I can use basic facts to approximate decimal quotients with two-digit divisors, reasoning about the placement of the decimal point. Learning Targets

  4. Activate Knowledge Write the number 10 tenths

  5. Activate Knowledge Write the number 90 tenths

  6. Activate Knowledge Write the number 94 tenths

  7. Activate Knowledge Write the number 100 tenths

  8. Activate Knowledge Write the number 700 tenths

  9. Activate Knowledge Write the number 783 tenths

  10. Activate Knowledge Write the number 372 tenths

  11. Activate Knowledge Write the number 9 hundredths

  12. Activate Knowledge Write the number 10 hundredths

  13. Activate Knowledge Write the number 90 hundredths

  14. Activate Knowledge Write the number 98 hundredths

  15. Activate Knowledge Write the number 100 hundredths

  16. Activate Knowledge Write the number 900 hundredths

  17. Activate Knowledge Write the number 980 hundredths

  18. Activate Knowledge Write the number 1,000 hundredths

  19. Activate Knowledge Write the number 7,000 hundredths

  20. Activate Knowledge Write the number 7,400 hundredths

  21. Activate Knowledge Write the number 7,418 hundredths

  22. Activate Knowledge Write the number 4,835 hundredths

  23. Activate Knowledge Write the division sentence and quotient 380 ÷ 10 3 8 0

  24. Activate Knowledge When dividing by 10, digits shift howmany places to the right? 380 ÷ 10 3 8 0

  25. Activate Knowledge Write the division sentence and quotient 38 ÷ 10 3 8

  26. Activate Knowledge Write the division sentence and quotient 3.8 ÷ 10 3 8

  27. Activate Knowledge Write the division sentence and quotient 270 ÷ 10 2 7 0

  28. Activate Knowledge Write the division sentence and quotient 2.7 ÷ 10 2 7

  29. Activate Knowledge Write the division sentence and quotient 4,900 ÷ 10 4 9 0 0

  30. Activate Knowledge Write the division sentence and quotient 49 ÷ 10 4 9

  31. Activate Knowledge Write the division sentence and quotient 0.49 ÷ 10 4 9

  32. Activate Knowledge Solve the division problem expressingthe whole in tenths 1.2 ÷ 4 =

  33. Activate Knowledge Write as a three step division taking out the ten 1.2 ÷ 4 = 0.3 1.2 ÷ 40 =

  34. Activate Knowledge Write as a three step division taking out the ten 1.2 ÷ 4 = 0.3 1.2 ÷ 40 = 1.2 ÷ 40 = 1.2 ÷ 10 ÷ 4 = 0.12 ÷ 4 = 0.03

  35. Activate Knowledge Solve the division problem expressingthe whole in tenths 2.4 ÷ 2 =

  36. Activate Knowledge Write as a three step division taking out the ten 2.4 ÷ 2 = 2.4 ÷ 20 =

  37. Activate Knowledge Solve the division problem expressingthe whole in tenths 8 ÷ 2 =

  38. Activate Knowledge Write as a three step division taking out the ten 8 ÷ 2 = 8 ÷ 20 =

  39. Activate Knowledge Solve the division problem expressingthe whole in hundredths 0.35 ÷ 5 =

  40. Activate Knowledge Write as a three step division taking out the ten 0.35 ÷ 5 = 0.35 ÷ 50 =

  41. Activate Knowledge Ms. Heinz spent 12 dollars on 30 bus tokens for the field trip. What was the cost of 12 tokens?

  42. Learn Round the divisor first 39.1 ÷ 17 Problem 1

  43. Learn Round the the whole to somethingcan easily be divided by 20 39.1 ÷ 17 ____ ÷ 20 ≈ Problem 1

  44. Learn Can you think of a multiple of 2 3.91 ÷ 17 ____ ÷ 20 ≈ Problem 1

  45. Learn Can you think of a multiple of 2 3.91 ÷ 17 ____ ÷ 20 ≈ 4 ÷ 20 = 4 ÷ 10 ÷ 2 = 0.4 ÷ 2 = 0.2. 4 ÷ 2 = 2 and 2 ÷ 10 = 0.2. Problem 1

  46. Learn 3.91 ÷ 17 ≈ 4 ÷ 20 = 0.4 ÷ 2 = 0.2 39.1 ÷ 17 ≈ 40 ÷ 20 = 4 ÷ 2 = 2 Problem 1

  47. Learn 63.6 pounds of rice were put into73 bags. About how many poundsof rice were in each bag? Problem 2

  48. Learn 63.6 pounds of rice were put into73 bags. About how many poundsof rice were in each bag? 63.6 ÷ 73 Problem 2

  49. Learn We can estimate the divisor to be 70 because 63 in the whole is a multiple of 7 63.6 ÷ 73 ≈ ____ ÷ 70 Problem 2

  50. Learn 6.36 ÷ 73 ≈ Problem 2

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