20 以内的加减混合填空练习 ( )+5=12 11+( )=19 20-( )=15 10+( )=20 16-( )=0 ( )+7=17 ( )-2=18 9+( )=17 19-( )=7 13+( )=16 ( )-4=10 ( )+2=11 ( )-5=9 ( )+7=15 6+( )=12 9+( )=15 3+( )=11 ( )+8=14 17-( )=7 ( )-5=10 13-( )=10 ( )+6=11 10+( )=16 7+( )=15 17-( )=17 ( )+12=12 13+( )=16 18-( )=9 5+( )=14 11-( )=5 17-( )=10 14+( )=18 ( )+8=12 ( )-12=3 ( )-8=8 ( )+5=18 2+( )=10 4+( )=8 5+( )=10 9+( )=18 3+( )=17 ( )+6=10 ( )+3= ( )+1=20 ( )+7=10 ( )+9=20 13+ ( )=1 14-( )=10 12+( )=18 15-( )=11 ( )+5=13 19-( )=5 ( )+2=16 18-( )=4 ( )+2=14 4+( )=20 19-( )=14 ( )-5=13 15+( )=17 ( )-15=5 19-( )=4 ( )-15=2 9+( )=18 15-( )=10 ( )-6=13 ( )+9=19 20-( )=4 19-( )=3 ( )+11=15 ( )-6=12 18-( )=11 17-( )=10 ( )+6=15 ( )-7=11 13+( )=14 17-( )=10 ( )-8=11 10+( )=17 ( )+5=12 18-( )=9 5+( )=14 11-( )=5 17-( )=10 14+( )=18 ( )+8=12