Question

умножить и расписать!!
12/14 × 7/16
7/21 × 14/28
2 3/7 × 14
3 6/8 × 16
3 4/9 × 2 12/31 ​

Answer 1

12/14 × 7/16 = сокращаем 14 и 7 на 7, а 16 и 12 на 4 = 3/2 × 1/4 = 3/8

7/21×14/28 = сокращаем 7 и 21 на 7, а 14 и 28 на 14 = 1/3× 1/2 = 1/6

2 3/7 × 14 = 2 3/7 × 14/1 = сокращаем 14 на 7 = 17× 2/1 = 34/1

3 6/8 ×16= 3 6/8 × 16/1 = сокращаем 16 и 8 на 8 = 30 × 2/1 = 60/1

3 4/9 × 2 12/31 = 31/9 × 2 × 12/31 сокращаем 31 на 31, а 9 и 12 на 3 = 1/3×2×4 = 8/3 или 2 2/3