Basic Subtraction:
for more on this topic…..
Subtraction 2:
Subtraction 3: Introduction to Borrowing or Regrouping:
Alternate mental subtraction method:
Why borrowing works:
Level 4 Subtraction:
Basic Subtraction:
for more on this topic…..
Subtraction 2:
Subtraction 3: Introduction to Borrowing or Regrouping:
Alternate mental subtraction method:
Why borrowing works:
Level 4 Subtraction:
