Subtracting 1s using place value
cc-2nd-add-subtract-100--cc-2nd-sub-ones-tens--understanding-place-value-while-subtracting-ones
Add and subtract within 100
Visually subtract within 100
Sal subtracts 4 from 46 by thinking about place value.
Sal subtracts 4 from 46 by thinking about place value.