2. Operations with Fractions By Teacher Angelo

3. Addition and Subtraction of Like Fractions Examples: 1.) 2/7 + 3/7 = 5/7 2.) 8/15 + 2/15 = 10/15 or 2/3 3.) 7/11 - 2/11 = 5/11 4.) 6/17 - 2/17 = 4/17 Same denominator

4. Addition and Subtraction of Unlike Fractions Examples on the board different denominators

5. Properties of Addition 1.) Commutative property of addition Examples 1.) 2/3 + ½ = ½ + 2/3 2.) 3/9 + ¾ = ¾ + 3/9

6. Special Seatwork: (For 5 points) Give 5 examples of commutative property of addition.

7. 2.) Associative property of addition Examples 1.) (2/3 + ½ ) + ¾ = 2/3 + ( ½ + ¾ ) 2.) (3/9 + ¾) + ½ = 3/9 + ( ¾ + ½)

8. Special Seatwork: (For 5 points) Give 5 examples of Associative property of addition.

9. Workbook Exercise A Number 1, 2, 3 and 4 on page 39 to 41

10. Multiplication and Division of Fractions

11. Multiplication of fractions by whole numbers

13. Workbook Exercise B Number 1, 2 and 3 on page 42

14. Multiplication with Fractions Rule: Multiply the numerators and the denominators respectively and then, simplify.

15. Example 1: 1 x 3 = 1 x 3 2 4 2 x 4 = 3 8

16. Example 2: 2 x 1 = 2 x 1 3 4 3 x 4 = 2 12 = 1 6

17. Board Work: More Examples On Multiplication with fractions

18. Workbook Exercise B Number 4 on page 43

19. Division with Fractions Rule: Find the reciprocal of the divisor, multiply it to the dividend then, simplify.

20. Example 1: 1 ÷ 3 = 1 x 4 2 4 2 3 = 4 6 = 2 3

21. Example 2: 3 ÷ 5 = 3 x 6 8 6 8 5 = 18 40 = 9 20

22. Board Work: More Examples On Division with fractions

23. Workbook Exercise B Number 4 and 5 on page 43

24. Group Work: Workbook Exercise B Number 6 and 7 on page 44

25. Solving Word Problems with Fractions Example 1 Albert ate 3/8 of a cake baked by his mother. His sister ate 1/8 of it. What fraction of the cake did they both eat in total? We Understand Question: What fraction of the cake did they both eat in total? Given: Albert ate 3/8 of a cake and his sister ate 1/8 of it.

26. We Plan Key word : total Operation: addition We Solve Number Sentence: 3/8 + 1/8 = _____ Working: 3/8 + 1/8 = 3 + 1 8 = 4 8 = 1 2

27. We Check By commutative property of addition: 3/8 + 1/8 = 1/8 + 3/8 1 = 1 + 3 2 8 1 = 4 2 8 1 = 1 2 2 Answer: They both ate ½ part of the cake in total.

28. Workbook Exercise C Letter B, C, D, E, F, G and H on page 46 to 52.

29. Solving mixed operations with fractions.

30. Example 1 Working on the board:

31. Example 2

32. Example 3

33. Practice: Write and solve the following in your notebook.

34. Special Seatwork ( 3 points) Answer: 2/5

35. Special Seatwork ( 3 points) Answer: 12/121

36. Special Seatwork ( 3 points) Answer: 1

37. Special Seatwork ( 3 points) Answer: 1/2

38. Special Seatwork ( 3 points) Answer: 7/10

39. Special Seatwork ( 3 points) Answer: 1/2

40. Special Seatwork ( 3 points) Answer: 2/7

41. Special Seatwork ( 3 points) Answer: 8/21

42. Special Seatwork ( 3 points) Answer: 19/60

43. Special Seatwork ( 3 points) Answer: 2/3

44. Special Seatwork ( 3 points) Answer: 5/84

45. Special Seatwork ( 3 points) Answer: 3/28

46. Workbook Exercise D Number 1 and 2 on page 53.

47. Activity number 9

48. Solving mixed-operation word problems with fraction Example 1

52. Workbook Exercise E Letter A, B, C and D

53. Lesson 3 Test + Vocabulary and Spelling Test