Arithmetic Grade Four

Lesson One hundred and seventy-six: Functions

Here is another INPUT-FUNCTION-OUTPUT example:
INPUTFUNCTION: ? x 3 + 2 OUTPUT
5 5 x 3 + 2 17
10 10 x 3 + 2 32
15 15 x 3 + 2 47
20 20 x 3 + 2 62

Remember that you multiply before you add.
This function tells us to take the input number and multiply it by five. The number "plugged" into the function is shown in magenta in this example.

Here's another example:
INPUT FUNCTION: 3 + ? x 3 OUTPUT
5 3 + 5 x 3 18
10 3 + 10 x 3 33
2 3 + 2 x 3 9
7 3 + 7 x 3 24

Remember that you multiply before adding. Multiplication overrides left to right order (which explains the output in the above examples).
Now you get to try a few of these yourself.

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