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Presented by Barb Pecoraro. 26 x37 54 x 97 = 81* 62 =

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Presentation on theme: "Presented by Barb Pecoraro. 26 x37 54 x 97 = 81* 62 ="— Presentation transcript:

1 Presented by Barb Pecoraro

2 26 x37 54 x 97 = 81* 62 =

3

4 Traditional Partial Products Lattice Your Own Method I am confused

5 43 x ,161 Do you recognize this method? I am confused.

6 2 43 x ,161 Do you recognize this method? Did your parents try to teach you this method? I am more confused.

7 Do you recognize this method? What?

8

9

10 25 x (6 x 5)

11 25 x (6 x 5) 120 (6 x 20)

12 25 x (6 x 5) 120 (6 x 20) 150 (30 x 5)

13 25 x (6 x 5) 120 (6 x 20) 150 (30 x 5) 600 (30 x 20)

14 25 x (6 x 5) 120 (6 x 20) 150 (30 x 5) (30 x 20)

15 25 x (6 x 5) 120 (6 x 20) 150 (30 x 5) (30 x 20) 900

16 25 x (6 x 5) 120 (6 x 20) 150 (30 x 5) (30 x 20) 900

17 25 x (6 x 5) 120 (6 x 20) 150 (30 x 5) (30 x 20) 900

18

19 3 25 x 36 0 (6 x 5 = 30) Write the 0, regroup 3

20 3 25 x (6 x 5 = 30) Write the 0, regroup 3 ( (6 x 2) + 3 = 15)

21 3 25 x (6 x 5 = 30) Write the 0, regroup 3 0 ( (6 x 2) + 3 = 15) Write a 0; Cross out 3

22 x (6 x 5 = 30) Write the 0, regroup 3 50 ( (6 x 2) + 3 = 15) Write a 0; Cross out 3 (3 x 5 = 15) Write the 5; regroup 1

23 x (6 x 5 = 30) Write the 0, regroup ( (6 x 2) + 3 = 15) Write a 0; Cross out 3 (3 x 5 = 15) Write the 5; regroup 1 ( (3 x 2) + 1 = 7) Write the 7

24 x (6 x 5 = 30) Write the 0, regroup ( (6 x 2) + 3 = 15) 900 Write a 0; Cross out 3 (3 x 5 = 15) Write the 5; regroup 1 ( (3 x 2) + 1 = 7) Write the 7 Add

25 x (6 x 5 = 30) Write the 0, regroup ( (6 x 2) + 3 = 15) 900 Write a 0; Cross out 3 (3 x 5 = 15) Write the 5; regroup 1 ( (3 x 2) + 1 = 7) Write the 7 Add

26 x (6 x 5 = 30) Write the 0, regroup ( (6 x 2) + 3 = 15) 900 Write a 0; Cross out 3 (3 x 5 = 15) Write the 5; regroup 1 ( (3 x 2) + 1 = 7) Write the 7 Add

27

28 Draw the lattice grid.

29 Write the two factors

30 Multiply the red digits

31 Multiply the green digits

32 Multiply the blue digits

33 Multiply the purple digits

34 Add the digits in the lane with the thin arrow Start here.

35 Add the digits in the lane with the arrow

36 Add the digits in the lane with arrow Regroup one group of ten in next lane.

37 Add the digits in the lane with the arrow

38 The product is 900.

39

40

41 Repeated Addition

42 62 x 15

43 62 x (5 x 2) 20 (10 x 2) 300 (5 x 60) +600 (10 x 60) 930

44 62 x

45

46

47

48 Lattice grid


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