Răspuns:
a) 9/10 + 7/10 = 16/10 = 8/5
b) 7/10 + 23/100 = 70/100 + 23/100 = 93/100
c) 1/100 + 19/1000 = 10/1000 + 19/1000 = 29/1000
d) 3/10 + 2/10 = 5/10 = 1/2
e) 3/100 + 1/10 = 3/100 + 10/100 = 13/100
f) 11/10 - 9/10 = 2/10 = 1/5
g) 9/10 - 73/100 = 90/100 - 73/100 = 17/100
h) 1/10 - 59/1000 = 100/1000 - 59/1000 = 41/1000
