а) 3/8 × 2 = 6/8 = 3/4б) 5/18 × 12 = 60/18 = 10/3в) 7/15 × 40 = 280/15 = 56/3г) 7/8 × 24 = 168/8 = 21д) 1/2 × 30 = 30/2 = 15е) 9/11 × 11 = 99/11 = 9ж) 2/3 × 1 = 2/3з) 19/20 × 0 = 0
а) 3/8 × 2 = 6/8 = 3/4
б) 5/18 × 12 = 60/18 = 10/3
в) 7/15 × 40 = 280/15 = 56/3
г) 7/8 × 24 = 168/8 = 21
д) 1/2 × 30 = 30/2 = 15
е) 9/11 × 11 = 99/11 = 9
ж) 2/3 × 1 = 2/3
з) 19/20 × 0 = 0