1) 8 3/20 × 40/81 = 326 / 81
2) 10 1/3 × 9 /93 = 1
3) 4 1 /7 × 28/58 = 2
4) 3 / 13 × 19 1/2 = 57 / 26
2 задание
1) 1/7 a
2) 3 /20 a
3 задание
14/5
