When you add a 1-digit number to a 3-digit number, the same rules apply as when you are adding a 1-digit number to a 1 or 2-digit number. Number lines, partitioning, Base 10 and the column method ...
New area code, who dis? The Big Apple is getting a new area code after a state board Thursday approved a long-gestating ...
When you add a 1-digit number to a 3-digit number, the same rules apply as when you are adding a 1-digit number to a 1 or 2-digit number. Number lines, partitioning, Base 10 and the column method ...