1) -60:$56-59+3\ast (-1)$ = -60:$56-59-3$ = -60:$14-3$ = -60:11
= -5.45

2) $-9-12:(-3)-3$4
= $-9+4-3$4
= $-8$*4
= -32

3) -100$-0.09$+5$-0.01$ = 9+$-0.05$ = 9-0.05
= 8.95

4) $1/6-3/4$ $-9$ = $-11/12$$-9$ = 11

5) 35/54:$5/6-2$ = 35/54:$-7/6$ = 35/54*$-6/7$ = -5/9

6) $2.9-7.1$ : $-0.7$ = -4.2 / $-0.7$ = 6

7) 18:$-18.4-8.6$ = 18 / $-27$ = -2/3

8) $-однацелая1/7$ : 0.8 + 2.2 $-5/11$ = $-8/7$ / 0.8 + 2.2 $-5/11$ = $-8/7$ / 0.8 + $-11/5$ = -1.14 + $-11/5$ = -1.14 -2.2
= -3.34

Уравнения:

9) -x*$-0.6$ = -240
x = -240 / 0.6
x = 400

10) x / $-2.8$ = 0.15
x = 0.15 * $-2.8$ x = -0.42

11) -3/7x = 27/28
x = $27/28$ / $-3/7$ x = $27/28$ * $-7/3$ x = -7/4