Odpowiedź :
A) 3 × 7/8= 3/1 ×7/8 = 21/8= 2 5/8
B) 8/7 × 3 = 8/7 × 3/1 = 24/7 = 3 3/7
C) 2 × 1 1/7 = 2/1 × 8/7 = 16/7 = 2 2/7
D) 2 1/5 × 3 = 11/5 × 3/1 = 33/5 = 6 3/5
E) 5 × 10 1/2 = 5/1 × 21/2 = 105/2 = 52 1/2
F) 10 × 8 2/3 = 10/1 × 24/3 = 5/1 × 12/3 = 60/3 = 20