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EXAMPLE 1

EXAMPLE 1. Multiply Decimals Using Mental Math. a. 0.05 1000. EXAMPLE 1. Multiply Decimals Using Mental Math. a. 0.05 1000. Move 3 places to the right. EXAMPLE 1. Multiply Decimals Using Mental Math. a. = 0 0 5 0. 0.05 1000. Move 3 places to the right. EXAMPLE 1.

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EXAMPLE 1

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  1. EXAMPLE 1 Multiply Decimals Using Mental Math a. 0.05 1000

  2. EXAMPLE 1 Multiply Decimals Using Mental Math a. 0.05 1000 Move 3 places to the right.

  3. EXAMPLE 1 Multiply Decimals Using Mental Math a. = 0 0 5 0. 0.05 1000 Move 3 places to the right.

  4. EXAMPLE 1 Multiply Decimals Using Mental Math a. = 0 0 5 0. 0.05 1000 Move 3 places to the right. = 50

  5. EXAMPLE 1 Multiply Decimals Using Mental Math a. = 0 0 5 0. 0.05 1000 Move 3 places to the right. = 50 b. 95.38 0.0001

  6. EXAMPLE 1 Multiply Decimals Using Mental Math a. = 0 0 5 0. 0.05 1000 Move 3 places to the right. = 50 b. 95.38 0.0001 Move 4 places to the left.

  7. EXAMPLE 1 Multiply Decimals Using Mental Math a. = 0 0 5 0. 0.05 1000 Move 3 places to the right. = 50 b. = .0 0 9 5 3 8 95.38 0.0001 Move 4 places to the left.

  8. EXAMPLE 1 Multiply Decimals Using Mental Math a. = 0 0 5 0. 0.05 1000 Move 3 places to the right. = 50 b. = .0 0 9 5 3 8 95.38 0.0001 Move 4 places to the left. = 0.009538

  9. EXAMPLE 2 Multiply Decimals by Powers of Ten Bridges The graph shows the number of vehicles that crossed bridges during 2000. How many vehicles crossed the Golden Gate Bridge?

  10. EXAMPLE 2 Multiply Decimals by Powers of Ten Bridges The graph shows the number of vehicles that crossed bridges during 2000. How many vehicles crossed the Golden Gate Bridge?

  11. EXAMPLE 2 Multiply Decimals by Powers of Ten 4.25 10,000,000

  12. EXAMPLE 2 Multiply Decimals by Powers of Ten 4.25 10,000,000 Move 7 places to the right.

  13. EXAMPLE 2 Multiply Decimals by Powers of Ten = 4 2 5 0 0 0 0 0 . 4.25 10,000,000 Move 7 places to the right.

  14. EXAMPLE 2 Multiply Decimals by Powers of Ten = 4 2 5 0 0 0 0 0 . 4.25 10,000,000 Move 7 places to the right. = 42,500,000

  15. EXAMPLE 2 Multiply Decimals by Powers of Ten = 4 2 5 0 0 0 0 0 . 4.25 10,000,000 Move 7 places to the right. = 42,500,000 ANSWER In 2000, 42,500,000 vehicles crossed the Golden Gate Bridge.

  16. EXAMPLE 3 Divide Decimals Using Mental Math a. 508.3 10

  17. EXAMPLE 3 Divide Decimals Using Mental Math a. 508.3 10 Move 1 place to the left.

  18. EXAMPLE 3 Divide Decimals Using Mental Math a. = 5 0 . 8 3 508.3 10 Move 1 place to the left.

  19. EXAMPLE 3 Divide Decimals Using Mental Math a. = 5 0 . 8 3 508.3 10 Move 1 place to the left. = 50.83

  20. EXAMPLE 3 Divide Decimals Using Mental Math a. = 5 0 . 8 3 508.3 10 Move 1 place to the left. = 50.83 b. 508.3 0.01

  21. EXAMPLE 3 Divide Decimals Using Mental Math a. = 5 0 . 8 3 508.3 10 Move 1 place to the left. = 50.83 b. 508.3 0.01 Move 2 places to the right.

  22. EXAMPLE 3 Divide Decimals Using Mental Math a. = 5 0 . 8 3 508.3 10 Move 1 place to the left. = 50.83 b. = 5 0 8 3 0 . 508.3 0.01 Move 2 places to the right.

  23. EXAMPLE 3 Divide Decimals Using Mental Math a. = 5 0 . 8 3 508.3 10 Move 1 place to the left. = 50.83 b. = 5 0 8 3 0 . 508.3 0.01 Move 2 places to the right. = 50,830

  24. for Example 1,2 and 3 GUIDED PRACTICE

  25. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math.

  26. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. 1. 6.07 1000

  27. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. 1. 6.07 1000 Move 3 places to the right.

  28. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right.

  29. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. 2. 153.6 0.01

  30. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. 2. 153.6 0.01 Move 2 places to the left.

  31. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left.

  32. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. 3. 42.6 100

  33. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. 3. 42.6 100 Move 2 places to the left.

  34. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left.

  35. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. 4. 509 1000

  36. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. 4. 509 1000 Move 3 places to the left.

  37. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. = 0.509 4. 509 1000 Move 3 places to the left.

  38. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. = 0.509 4. 509 1000 Move 3 places to the left. 5. 5 0.1

  39. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. = 0.509 4. 509 1000 Move 3 places to the left. 5. 5 0.1 Move 1 places to the right.

  40. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. = 0.509 4. 509 1000 Move 3 places to the left. = 50 5. 5 0.1 Move 1 places to the right.

  41. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. = 0.509 4. 509 1000 Move 3 places to the left. = 50 5. 5 0.1 Move 1 places to the right. 6. 3.2 0.001

  42. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. = 0.509 4. 509 1000 Move 3 places to the left. = 50 5. 5 0.1 Move 1 places to the right. 6. 3.2 0.001 Move 3 places to the right.

  43. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. = 6070 1. 6.07 1000 Move 3 places to the right. = 1.536 2. 153.6 0.01 Move 2 places to the left. = 0.426 3. 42.6 100 Move 2 places to the left. = 0.509 4. 509 1000 Move 3 places to the left. = 50 5. 5 0.1 Move 1 places to the right. = 3200 6. 3.2 0.001 Move 3 places to the right.

  44. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. 7. Bridges Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000.

  45. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. 7. Bridges Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000. 5.34 10,000,000

  46. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. 7. Bridges Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000. 5.34 10,000,000 Move 7 places to the right.

  47. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. 7. Bridges Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000. = 53,400,000 5.34 10,000,000 Move 7 places to the right.

  48. for Example 1,2 and 3 GUIDED PRACTICE Find the product or quotient using mental math. 7. Bridges Use the graph in Example 2 to estimate the number of vehicles that crossed the George Washington Bridge in 2000. = 53,400,000 5.34 10,000,000 Move 7 places to the right. ANSWER In 2000, 53,400,000 vehicles crossed the George Washington Bridge.

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