计算下面各题。1_:L;u8Z9g/i
4.65+5.25=/f-u5g7j;S/_.l7@,A(]1_:L;u8Z9g/i
15.7+7.93=8w5h4i3D-]:R'l(t1I5c-x1_:L;u8Z9g/i
6.21-1.19=7[+h5c4q3c7{){1_:L;u8Z9g/i
10-9.77=;k0^,Y*s7q3B:N7k:}0\,R1_:L;u8Z9g/i