1. (2021一上·昌江期中) 口算。

9-5=         2+8=         2+6=         5+3=

7+3=        4+6=         10-7=        8-4=

6+3=        9-7=         10-8=         8-0=

8–6=         5+4=        3+3=         8–2 =