• Adding and Subtracting by 10s
     Help
  • 20 + 80 =
    100
  • 90 - 60 =
    30
  • 52 + 20 =
    72
  • Unlock this slideshow and over 3 million more with Baamboozle+
    Try slideshows
    • Your experience on this site will be improved by allowing cookies.