Study

Adding and Subtracting within 20

  •   0%
  •  0     0     0

      Back   Restart
  • 20-7
    13
  • 18-4
    14
  • 15-4
    11
  • 13+5
    18
  • 17+3
    20
  • 10+10
    20
  • 17-6
    11
  • 12+7
    19
  • 14+4
    18
  • 14+3
    17
  • 10+6
    16
  • 10+5
    15
  • 12+8
    20
  • 16-3
    13
  • 14+6
    20
  • 14+5
    19
  • 17-5
    12
  • 10+9
    19
  • 12+6
    18
  • 12-8
    4
  • 15+4
    19
    • Your experience on this site will be improved by allowing cookies.