1) 26-(-5)= 26+5
=
31
2) -4+(-18)
= -4-18
= -22
3) 14-(-18)
= 14+18
= 32
4) 4,7-8,1
= -3,4
5) -3,3+9,6
= 6,3
6) 7-(-4,9)
= 7+4,9
= 11,9
7) -5-(-2,9)
= -5+2,9
= -2,1
8) -5/12-(-7/12)
= -5/12+7/12
=2/12
=1/6
9) -3 1/2-(-1 3/4)
= -7/2+7/4
= -14/4+7/4
= -7/4
10) 2 2/3-3 5/9
= 8/3- 32/9
= 24/9-32/9
= -8/9
11) -1 5/8+3/4
= -13/8+3/4
= -13/8+6/8
= -7/8
12) 2/5-0,7
= 0,4-0,7
= -0,3
13) -8/15-(-0,4) -8/15+4/10
= -16/30+12/30
= -4/30
14) -3,2-2 1/3
= -32/10-7/3
= -96/30-70/30
= -166/30
= -5 16/30
15) 7,8-8 1/4
= 78/10-33/4
= 156/20-165/20
= -9/20