=0.35+0.25-0.6-0.54

=0.6-0.6-0.54

=-0.54

2.(—2)+(—2/ 1)+3/ 1+(—6/ 1)

=-2-2/ 1- 1/6+3/ 1

=-2-3/ 1

=-2 and 3 1

3.(—23)+58+(— 17)

=-(23+ 17)+50+8

=-50+50+8

=8

4.(—2.8)+(—3.6)+(— 1.5)+3.6

=3.6-3.6-3+0.2- 1.5

=-4.5+0.2

=-4.3

5.6/ 1+(—7/2)+(—6/5)+7/5

= 1-6/5-7/2-6/5+ 1-7/2

=2-6/ 10-7/4

=6/2-7/4

=2 1/7-2 1/ 12

=-2 1/5

. (—56)— 48 —(—48)— (—56)

=-56-48+48+56

=56-56+48-48

=0+0

=0

The idea is that when brackets are removed, the same symbol is positive and different symbols are negative.