a = 9 3/7 = 9 + 3/7 = 64/7b = 10 7/10 = 10 + 7/10 = 107/10
a + b = 64/7 + 107/10 = (640/70) + (749/70) = 1389/70 = 19 79/70
a - b = 64/7 - 107/10 = (640/70) - (749/70) = -109/70 = -1 39/70
b = 3 1/5 = 3 + 1/5 = 16/5
a + b = 14 2/2114 + 2/21 = 294/21 + 2/21 = 296/21 = 14 2/21
a - b = 9 3/7 - 3 1/5= 66/7 - 16/5= (330/35) - (112/35)= 218/35= 6 8/35
a = 9 3/7 = 9 + 3/7 = 64/7
b = 10 7/10 = 10 + 7/10 = 107/10
a + b = 64/7 + 107/10 = (640/70) + (749/70) = 1389/70 = 19 79/70
a - b = 64/7 - 107/10 = (640/70) - (749/70) = -109/70 = -1 39/70
b = 3 1/5 = 3 + 1/5 = 16/5
a + b = 14 2/21
14 + 2/21 = 294/21 + 2/21 = 296/21 = 14 2/21
a - b = 9 3/7 - 3 1/5
= 66/7 - 16/5
= (330/35) - (112/35)
= 218/35
= 6 8/35