20以内加减法填括号（2023-07-12）

20以内加减法填括号（2023-07-12）：6+( )=19 8+( )=18 ( )-9=8 ( )+7=16 11-( )=1 18-( )=13 ( )-11=1 ( )+3=9 ( )-8=7 ( )-10=2 14+( )=19 12+( )=18 ( )-3=4 ( )-6=5 ( )-3=6 18-( )=2 ( )-15=5 ( )+3=19 18-( )=1 14-( )=8 6+( )=16 20-( )=2 ( )+5=12 ( )-8=10 ( )-12=5 7-( )=3 6+( )=18 15-( )=6 14-( )=7 ( )-9=1 8-( )=1 12+( )=17 13-( )=4 17-( )=6 7+( )=17 11+( )=14 16-( )=12 7+( )=14 ( )-3=13 ( )-8=12 7-( )=2 ( )+4=17 ( )+8=...