Add 3 numbers

The first instance of  is under the Early Math Math Mission. This exercise introduces users to the idea of adding three numbers instead of just two. It illustrates addition as a multi-ary operation as opposed to a binary operation.

Types of Problems
There is one type of problem in this exercise:


 * 1) Use the chart and answer the problem: This problem has a word problem and an associated chart. The student is asked to add the numbers from the problem together. There are three numbers in the problem as opposed to the two numbers appearing in previous problems.3nos.png

Strategies
This exercise is easy to attain speed and accuracy badges. The numbers are relatively small and can be added quickly and correctly.


 * 1) The sum of all the numbers never exceeds twenty.
 * 2) The numbers that need to be added appear in the contextualized word problem and the chart, so it is more efficient to keep your eyes on the chart and add the numbers from there.