№4. Найдите значение выражения: 1) |4,5| + |- 2,3|; 2) |-13| \cdot |-6|; 3) |-\frac{7}{18}| - |\frac{5}{12}|; 4) |-48| : |-0,6|.

1) |4,5| + |-2,3|

|4,5| = 4,5

|-2,3| = 2,3

4,5 + 2,3 = 6,8

2) |-13| ⋅ |-6|

|-13| = 13

|-6| = 6

13 ⋅ 6 = 78

3) |−$$\frac{7}{18}$$| − |$$\frac{5}{12}$$|

|−$$\frac{7}{18}$$| = $$\frac{7}{18}$$

|$$\frac{5}{12}$$| = $$\frac{5}{12}$$

$$\frac{7}{18}$$ - $$\frac{5}{12}$$ = $$\frac{7 \cdot 2}{18 \cdot 2}$$ - $$\frac{5 \cdot 3}{12 \cdot 3}$$ = $$\frac{14}{36}$$ - $$\frac{15}{36}$$ = -$$\frac{1}{36}$$

4) |-48| : |-0,6|

|-48| = 48

|-0,6| = 0,6

48 : 0,6 = 480 : 6 = 80

Ответ: 1) 6,8; 2) 78; 3) -$$\frac{1}{36}$$; 4) 80