The Answer Editor for mathematical expressions consists of two parts: a rectangular field into which mathematical expressions are entered (the "entry field") is to the left, and a "keypad" made of buttons with mathematical symbols is to the right (Fig. 4.1). These buttons have labels in the Tutorial, but not afterwards. Mathematical expressions are entered and edited using the buttons of the Answer Editor keypad, as well as the basic keyboard, the Left and Right arrow keys, the Tab, Enter, and Backspace keys, and the mouse.

NOTE. Buttons are displayed to correspond with the kind of problem being solved. The selection is made in such a way as to avoid giving away the correct answer. Keyboard shortcuts (Fig. 4.2) work only when the corresponding button is displayed.

Expression	Answer Editor keypad button	Keyboard equivalent
Square Root	√	(none)
Fraction	[] ⁄ []	⁄
Mixed Number	[] [] ⁄ []	(none)
Repeating Decimal	‾	(none)
Absolute Value	[] | [] |	(none)
List of Expressions	[], [], …	,
Exponent	[][]	^ (before exponent)
Multiplication Expression	[] × []	×
Percentage	%	%
Greater-Than	[] > []	>
Less-Than	[] < []	<
Greater-Than-or-Equal-To	[] ≥ []	(none)
Less-Than-or-Equal-To	[] ≤ []	(none)
Equal-To	[] = []	=
Not-Equal-To	≠	(none)
AND	AND	(none)
OR	OR	(none)

Key	Effect
Right arrow - Tab - Enter	moves the cursor one place to the right (ahead)
Left arrow	moves the cursor one place to the left (back)
Backspace	deletes input immediately preceding (to the left of) the cursor and moves the cursor one place to the left (back) OR deletes selected input