Adding and subtracting fractions = 8/20 + 15/20 = 23/20 = 1 3/20 2/5 + 3/4 7/8 + 5/6 5/12 - 1/4 4) 1 1/2 - 3/4 5) 4 1/6 – 3 2/3 6) 3 2/5 + 1 1/4 7) 10 1/12 – 8 5/6 Extension: 8) 3 1/2 – 4 1/4 + 2 3/4 9) 2 4/9 – 1 2/3 + 5/6 = 21/24 + 20/24 = 41/24 = 1 17/24 = 5/12 – 3/12 = 2/12 = 1/6 = 3/2 – 3/4 = 6/4 - 3/4 = 3/4 = 25/6 – 11/3 = 25/6 – 22/6 = 3/6 = 1/2 =17/5 + 5/4 =68/20+25/20=93/20 =4 13/20 = 121/12 – 53/6 = 121/12 – 106/12 = 15/12 = 5/4 = 1 1/4 = 7/2 – 17/4 +11/4 = 14/4 – 6/4 = 8/4 = 2 = 22/9 – 5/3 + 5/6 = 44/18 – 30/18 + 15/18 = 29/18 = 1 11/18