Solve the following math problems: 90 * 120 = ? 120 / 45 = ? 25 * 55 = ? 7 * 1/25 = ? 6 3/4 * 3 = ? 21 / 4 = ? 13/2 * 14 = ? 6 * 9 = ? 12 * 4 = ? 7 * 4 = ? 25 * 46 = ? 7/25 = ? 9/2 = ? 16/7 = ? 28/13 = ? 506/5 = ?

Решение:

Выполним умножение и деление:

1. \( 90 \cdot 120 = 10800 \)
2. \( \frac{120}{45} = \frac{8}{3} \)
3. \( 25 \cdot 55 = 1375 \)
4. \( 7 \cdot \frac{1}{25} = \frac{7}{25} \)
5. \( 6 \frac{3}{4} \cdot 3 = \frac{27}{4} \cdot 3 = \frac{81}{4} = 20 \frac{1}{4} \)
6. \( 21 \div 4 = \frac{21}{4} = 5 \frac{1}{4} \)
7. \( \frac{13}{2} \cdot 14 = 13 \cdot 7 = 91 \)
8. \( 6 \cdot 9 = 54 \)
9. \( 12 \cdot 4 = 48 \)
10. \( 7 \cdot 4 = 28 \)
11. \( 25 \cdot 46 = 1150 \)
12. \( \frac{7}{25} \)
13. \( \frac{9}{2} = 4.5 \)
14. \( \frac{16}{7} \)
15. \( \frac{28}{13} \)
16. \( \frac{506}{5} = 101.2 \)

Ответ: 10800; 8/3; 1375; 7/25; 81/4; 21/4; 91; 54; 48; 28; 1150; 7/25; 9/2; 16/7; 28/13; 506/5.