Пошаговое объяснение:
7/9×2/5 = 14/45
3 3/5 × 2 1/12 = 18/5 * 25/12 = 15/2 = 7 1/2
2 5/8 × 4 /21 = 21/8 * 4/21 = 1/2
1. 14/45
2. 7 1/2
3. 1/2
1. 7/9×2/5 = 14/45
2. 3 3/5 × 2 1/12 = 18/5 * 25/12 = 15/2 = 7 1/2
3. 2 5/8 × 4 /21 = 21/8 * 4/21 = 1/2
Пошаговое объяснение:
7/9×2/5 = 14/45
3 3/5 × 2 1/12 = 18/5 * 25/12 = 15/2 = 7 1/2
2 5/8 × 4 /21 = 21/8 * 4/21 = 1/2
1. 14/45
2. 7 1/2
3. 1/2
Пошаговое объяснение:
1. 7/9×2/5 = 14/45
2. 3 3/5 × 2 1/12 = 18/5 * 25/12 = 15/2 = 7 1/2
3. 2 5/8 × 4 /21 = 21/8 * 4/21 = 1/2