Compare 2-digit numbers | |
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Description | |

Exercise Name:
| Compare 2-digit numbers |

Math Missions:
| Early math Math Mission, 3rd grade (U.S.) Math Mission |

Types of Problems:
| 3 |

The **Compare 2-digit numbers** exercise was under the Early math Math Mission and 3rd grade (U.S.) Math Mission, but was deleted by Khan Academy. This exercise practices ordering numbers and basic arithmetic of hundreds, tens and ones.

## Types of problems

There are two types of problems that show up in this exercise:

- Put numbers in increasing order: This problems has a list of numbers that are to be dragged into the correct increasing order (from smallest to largest).
- Compare the quantities: This problem requires the user to select the correct inequality symbol or the equals sign to make a statement true. On many, but not all, the user will need to perform some arithmetic before they are able to compare the two quantities.

## Strategies

Putting numbers in order is not a fast problem in the interface which makes speed badges fairly hard to attain here. Accuracy badges are fairly easy, but if user goes too quickly and do not read carefully it is easy to make minor errors in the arithmetic.

- On the first problem type, the smallest number (first in the list) is always the two-digit number since that is the only number less than 100.