1) 6 7/9 - 4 4/7 = 6 - 4 + 7/9 - 4/7 = 2 + 63/63 - 36/63 = 2 + 27/63 = 2 9/21 = 2 3/72) 10 4/5 - 7 3/12 = 10 - 7 + 4/5 - 3/12 = 3 + 48/60 - 15/60 = 3 + 33/60 = 3 11/203) 2 4/5 - 1 1/2 = 2 - 1 + 4/5 - 1/2 = 1 + 8/10 - 5/10 = 1 + 3/10 = 1 3/104) 1 5/7 - 3/5 = 1 - 0 + 5/7 - 3/5 = 1 + 25/35 - 21/35 = 1 + 4/35
1) 6 7/9 - 4 4/7 = 6 - 4 + 7/9 - 4/7 = 2 + 63/63 - 36/63 = 2 + 27/63 = 2 9/21 = 2 3/7
2) 10 4/5 - 7 3/12 = 10 - 7 + 4/5 - 3/12 = 3 + 48/60 - 15/60 = 3 + 33/60 = 3 11/20
3) 2 4/5 - 1 1/2 = 2 - 1 + 4/5 - 1/2 = 1 + 8/10 - 5/10 = 1 + 3/10 = 1 3/10
4) 1 5/7 - 3/5 = 1 - 0 + 5/7 - 3/5 = 1 + 25/35 - 21/35 = 1 + 4/35