Arithmetic Grade Four

Lesson One hundred and seventy-five: Functions

Here is another INPUT-FUNCTION-OUTPUT example:

INPUT	FUNCTION: ? + ? - 2	OUTPUT
1	1 + 1 - 2	0
2	2 + 2 - 2	2
3	3 + 3 - 2	4
4	4 + 4 - 2	6

The function tells us to take our input number and add it to itself and then to subtract 2 from this sum.

Here's another example:

INPUT	FUNCTION: 10 - ?	OUTPUT
2	10 - 2	8
4	10 - 4	6
6	10 - 6	4
8	10 - 8	2

Now you get to try a few of these yourself.

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