Double Digit Addition Math Activity
LD has been visually working on double digit addition.We put 10 mini erasers into Ziploc bags (and stapledthem shut so ED wouldn’t get into them!). Shown here is 19 + 27. He simply lays out 19 (1 bag +9)and 27 (2 bags +7). When he counts how many singleerasers there are he exchanges 10 singles for one bag of10. With this and the exchange game LD seems to havereally grasped...