Subtract 2-digit numbers (no regrouping)

The  exercise is in the Early math Math Mission. This exercise helps Khan Academy users to subtracting two-digit addition numbers.

Types of Problems
There is one type of problem in this exercise:
 * 1) Solve the equation: This problem has two two-digit numbers and the user is asked to subtract them.

Strategies
Knowledge of subtracting two-digit numbers without regrouping is essential to ensure success while doing this exercise.
 * 1) There is no regrouping in this exercise, so user doesn't need to carry digits.

Real-life Applications

 * 1) Problems like this will appear on standardized tests like the SATs.