Вправи: 65

65. Знайдіть значення виразів за таблицею 3.

c	–1	9	–3	–3
d	1	2	223	0,2
(c + d) : (c – d)	0	147	117	78
c-3d1+d	–2	1	–3	–3

1) (–1 + 1) : (–1 – 1) = 0 : (–2) = 0;

2) (9 + 2) : (9 – 2) = 117 = 147;

3) (–3 + 223) : (–3 – 223) = –13 : (–523) = 13 : 173 = 13 • 317 = 117;

4) (–3 + 0,2) : (–3 – 0,2) = –2,8 : (–3,2) = 2832 = 78;

5) -1-3 •11+1 = -1-32 = –42 = –2;

6) 9-3 •21+2 = 9-63 = 33 = 1;

7) -3-3 •2231+223 = -3-38 •831+ 3 = -3-81+223 = –11323 = –11 •311 = –3;

8) -3-3 •0,21+0,2 = -2-0,61,2 = –3,61,2 = –3612 = –3.