1. a) 7.5 - (-3.7) в) 7 1/4 - 8 2/9 г) - 8 5/12 - (-7 13/15)

2. a) 7.8 - x = 9.3 б) y - (- 17.85) = 12 в) 5 5/12 + z = 3 1/3

3. a) C (-6.1) и D (3,4) б) E (- 5/6) и F (-7/12)

4. |x - 2| = 4

1. a) 7.5 - (-3.7) = 7,5+3,7 = 11,2;

в) 7 1/4 - 8 2/9 = 29/4 - 74/9 = 261/36-296/36 = - 35/36;

г) - 8 5/12 - (-7 13/15) = - 101/12+118/15 = 1515/180 - 1416/180=99/180=0,55;

2.

a) 7.8 - x = 9.3

х=9,3-7,8

х=1,5

б) y - (- 17.85) = 12

у+17,85=12

у=12-17,85

у=-5,85