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

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Presentation on theme: "EXAMPLE 1 Multiply Decimals Using Mental Math a. 0.05 1000."— Presentation transcript:

1 EXAMPLE 1 Multiply Decimals Using Mental Math a

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

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

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

5 EXAMPLE 1 Multiply Decimals Using Mental Math b Move 3 places to the right. a = 50 =

6 EXAMPLE 1 Multiply Decimals Using Mental Math b. Move 4 places to the left. Move 3 places to the right. a = 50 =

7 EXAMPLE 1 Multiply Decimals Using Mental Math b. Move 4 places to the left. Move 3 places to the right. a = 50 = =

8 EXAMPLE 1 Multiply Decimals Using Mental Math b. Move 4 places to the left. Move 3 places to the right. a = 50 = = =

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

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

11 EXAMPLE 2 Multiply Decimals by Powers of Ten ,000,000

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

13 EXAMPLE 2 Multiply Decimals by Powers of Ten ,000,000 = Move 7 places to the right.

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

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

16 EXAMPLE 3 Divide Decimals Using Mental Math a

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

18 EXAMPLE 3 Divide Decimals Using Mental Math a = Move 1 place to the left.

19 EXAMPLE 3 Divide Decimals Using Mental Math a = Move 1 place to the left. = 50.83

20 EXAMPLE 3 Divide Decimals Using Mental Math a = Move 1 place to the left. = b

21 EXAMPLE 3 Divide Decimals Using Mental Math a = Move 1 place to the left. = b. Move 2 places to the right

22 EXAMPLE 3 Divide Decimals Using Mental Math a = Move 1 place to the left. = b. = Move 2 places to the right.

23 EXAMPLE 3 Divide Decimals Using Mental Math a = Move 1 place to the left. = b. = = 50, Move 2 places to the right.

24 GUIDED PRACTICE for Example 1,2 and 3

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

40 GUIDED PRACTICE for Example 1,2 and 3 Find the product or quotient using mental math = 6070 Move 3 places to the right. = Move 2 places to the left = Move 2 places to the left = Move 3 places to the left = 50 Move 1 places to the right

41 GUIDED PRACTICE for Example 1,2 and 3 Find the product or quotient using mental math = 6070 Move 3 places to the right. = Move 2 places to the left = Move 2 places to the left = Move 3 places to the left = 50 Move 1 places to the right

42 GUIDED PRACTICE for Example 1,2 and 3 Find the product or quotient using mental math = 6070 Move 3 places to the right. = Move 2 places to the left = Move 2 places to the left = Move 3 places to the left = 50 Move 1 places to the right Move 3 places to the right

43 GUIDED PRACTICE for Example 1,2 and 3 Find the product or quotient using mental math = 6070 Move 3 places to the right. = Move 2 places to the left = Move 2 places to the left = Move 3 places to the left = 50 Move 1 places to the right = 3200 Move 3 places to the right

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

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

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

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

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


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