21.30-7.10=
0.45-0.15=
12.50-3.60=
12.50+7.10+3.60=
8.90+6.30=
0.25+0.35=
19.80+22.70
22.70-15.30=
21.30+4.70=
8.90
15.20
17.40
23.20
42.50
26.00
14.20
0.60
0.30
