## How do I enter mixed fractions like 1⅔ ?

By mouse:

1 & 2 ÷ 3

By keyboard:

1 & 2 / 3

Hint:

Think of as and

& is the ‘and’ operator.

To learn more, go to Fractions.

## How do I insert something into the middle of an expression?

You press option (⌥) with the left or right cursor key:

`⌥ ◀` or `⌥ ▶`

Learn more about editing and its shortcuts.

## I have a price inclusive of tax, how do I calculate the price without tax?

You use the ‘inclusive’ function (inc).

Shortcut: ⇧i (shift-i).

## Example

The price is $220 (inclusive of tax) and the tax is 10%.

The price without tax is:

220 *inc* – tax

You get the same result with:

220 inc – 10%

Just to confirm the math:

200 + 10% = 220

(10% of 200 = 20)

A common mistake is to use ‘220 – tax’ or ‘220 – 10%’.

This leads to ‘220 – 22 = 198’ since 10% of 220 is 22

## Tip — Make ‘inc’ more accessible

Let’s make it a default button. This in turn simplifies its shortcut to *i*.

Hold down the button i until the menu appears and choose “Inclusive of %”.

To learn more, go to Tax or Percentages.

## How do I enter angles with minutes, and seconds like 30° 40ʹ 50ʺ?

Use the time format ‘*hour : minute : second*’.

It is analogous to *degree° minute′ second″*

For sin 30°40′50″, enter sin 30:40:50.

## How do I access the other logarithmic functions like log₂ and log₁₀?

Press L for log (base e) and ⇧L (shift-L) for log₁₀

If you frequently use log₁₀, you can make it the default.

(This way, its shortcut becomes L instead of ⇧L.)

## Here’s how:

1. Press the log button until its menu appears.

2. Select log₁₀

## Another tip

Instead of pressing ⇧L for the other log, you can press L twice.

(Pressing L repeatedly will cycle through the different logs.)

## How do I calculate the logarithm for any base?

For version 2.8.2 and above:

To calculate log ₃ 27, enter:

log (3 , 27).

You can also use the semicolon:

log (3 ; 27).

Menu:

Calculation ▸ Extra Functions ▸ Browse…

Shortcut:

Shift-command-F.