Adding a one-digit number and a two-digit number Adding two two-digit numbers Subtracting two digits Activity 1 Activity 2 Adding a one-digit number and a two-digit number To add a one-digit ...

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 can all be useful. Learn more about adding a 1 ...