Integers and decimal numbers

CalcMe does calculations in exact mode and only falls to the approximate mode when any decimal number is involved. A decimal number is a number that has a decimal mark. A number without a decimal mark is an integer. Examples of exact expressions that are not integer numbers are: 12, π, 2, ...

You can convert an exact expression to approximate by making a simple operation with a decimal number, like multiplying by 1.0.

Beware that, despite the correct answer being an integer, the student can always answer a decimal number close enough, and it will be graded as correct. If you want to force the student to answer an integer, you better set the Symbolic answer validation option.

Also note some CalcMe commands sometimes return an exact number and sometimes an approximate one. For example: atan(), integrate(), solve(),... When programming the algorithm in Define random variables and functions, keep this in mind.