Răspuns:
1. a) 3 x 2/7 = 6/7
b) 4 x 7/31 = 28/31
c) 5 x 11/78 = 55/78
d) 7 x 13/99 = 91/99
e) 2/3 x 4/7 = 8/21
f) 5/11 x 4/3 = 20/33
g) 7/10 x 3/8 = 21/80
h) 4/17 x 11/5 = 44/85
2. a) 16 x 3/40 = 48/40 = 6/5
b) 14 x 5/84 = 5/6
c) 2/21 x 7/5 = 14/105 = 2/15
d) 12/11 x 5/36 = 60/396 = 5/33
e) 14/27 x 9/16 = 126/432 = 7/24
f) 11/65 x 13/33 = 143/2145 = 1/15
g) 42/35 x 25/36 = 1050/1260 = 5/6
h) 24/35 x 14/64 = 336/2240 = 3/16
