4. Вычислите: 1) |-3,2|+|-1,9|-|2,25|; 2) |17/48|:-9/6.

1. |-3,2| + |-1,9| - |2,25| = 3,2 + 1,9 - 2,25 = 5,1 - 2,25 = 2,85

2. $$|\frac{17}{48}| \div (-\frac{9}{6}) = \frac{17}{48} \div (-\frac{3}{2}) = \frac{17}{48} \times (-\frac{2}{3}) = -\frac{17 \times 2}{48 \times 3} = -\frac{17}{24 \times 3} = -\frac{17}{72}$$

Ответ:

1. 2,85
2. -17/72