Repeated addition

The first instance of the Repeated addition exercise is under the Early Math Math Mission. This exercise helps students see how multiplication piggy-backs off of addition through adding the same quantity multiple times.

Types of problems
There are two types of problems that show up in this exercise:
 * 1) Select expressions that count objects: This problem has a pictured collection of objects arranged in rows and columns. The student is to select the correct expressions that represent the total number of objects in the collection.Repadd-1.png
 * 2) Select expressions that describe situation: This problem describes a situation, often accompanied by a chart. The student is to answer the question by selecting the expressions that evaluate to the answer to the problem.Repadd-2.png

Strategies
The accuracy badges are fairly easy here, but the speed badges are medium difficulty because of the needed multiple selection.


 * 1) Most problems have two answers, adding the higher number of small groups and adding the smaller number of large groups. For example, 6=2+2+2=3+3.
 * 2) The exception to the previous hint is when the number is a perfect square and you have the same number of groups as the size of the groups. In this case, there is only one solution.