Calculate. 1. 100 - 9 * 9, 2. 54 : 6 - 9, 3. 45 : 5 - 8, 4. (29 - 23) * 9, 5. 12 + 7 * 9, 6. 6 : 4 : 3

Решение:

1. \( 100 - 9 \cdot 9 = 100 - 81 = 19 \)
2. \( 54 : 6 - 9 = 9 - 9 = 0 \)
3. \( 45 : 5 - 8 = 9 - 8 = 1 \)
4. \( (29 - 23) \cdot 9 = 6 \cdot 9 = 54 \)
5. \( 12 + 7 \cdot 9 = 12 + 63 = 75 \)
6. \( 6 : 4 : 3 = 1.5 : 3 = 0.5 \)

Ответ: 19, 0, 1, 54, 75, 0.5.