Question

-5-9+3=?10-17+8=?-3-4+19-11=?-8+12-16-23=?-4.2+5.7-8.4+10=?6

Answer 1

-5-9+3=－14＋3=－11

10-17+8=18－17=1

-3-4+19-11=19－18=1

-8+12-16-23=4－39=－35

-4.2+5.7-8.4+10=15.7－12.6=3.1

6.1-3.7-4.9+1.8=7.9－8.6=－0.7