а) 12 × 3/4 = 9
б) 64 × 7/8 = 56
в) 9/16 × 1/3 = 3/16
г) 4/25 × 5/8 = 1/10 = 0,1
д) 30 × 4/10 = 120/10 = 12
е) 40 × 55/100 = 2 × 55/5 = 2 × 11 = 22
ж) 8/10 × 2/10 = 4/5 × 1/5 = 4/25 = 0,16
з) 42/10 × 7/10 = 21/5 × 7/10 = 147/50 = 2,94
и) 50 × 30/100 = 50 × 3/10 = 5 × 3 = 15
к) 126/10 × 35/100 = 63/5 × 35/100 = 63 × 7/100 = 441/100 = 4,41
л) 5/7 × 42/100 = 6/20 = 3/10 = 0,3
м) 66/13 × 65/100 = 33 × 5/50 = 33 × 1/10 = 33/10 = 3,3