Two-Digit Addition Resources

After early learners master counting to ten and addition within ten, it will be time to challenge them with two digit addition. Two digit addition will likely be the first time students attempt a maths problem that will require mental maths, as they won’t have enough fingers to count them.
One of the most important steps to acquiring Number senseIs to approach problems using different strategies. Some of the resources provided by Eduction.com may give students an opportunity to practise each of these methods.
Vertical Addition
The vertical addition method requires the student write the two addends, one on top of the other, with a vinculum underneath. The vinculum is the horizontal bar that will separate the addends from the sums. The first step of the vertical addition method is to add together the numbers in the ones column and write the sum under the vinculum. Now the digits in the tens columns are added. Remember that numbers in the tens column represent multiples of ten. Write this sum under the previous sum. Add the two sums together to get the greater sum.
Algorithm or Regroup Method
The algorithm method has students, once again, write the two addends, one over the other, on top of the vinculum. First the ones are added together. If the sum is greater than 10, the 10 is moved over the tens column and only the ones digit is written under the vinculum. Now the tens are added together, including the regrouped ten. This sum is written next to the previous sum. Read from left to right, this is the final sum of the problem.