HP 33s Scientific manual Keys Display Description, ALG Summary C-5

Parentheses Calculations

In ALG mode, you can use parentheses up to 13 levels. For example, suppose you want to calculate:

30⋅ 9

85 − 12

If you were to key in 30 ¯ 85 Ã, the calculator would calculate the intermediate result, 0.3529. However, that’s not what you want. To delay the division until you’ve subtracted 12 from 85, use parentheses:

Keys:	Display:	Description:
30 ¯ºy85 Ã		No calculation is
		done.
12 º		Calculates 85 − 12.
	
¸9		Calculates 30/73.
	_
Ï		Calculates 30/(85 −
		12) ⋅ 9.

You can omit the multiplication sign (⋅) before a left parenthesis. Implied multiplication is not available in Equation mode. For example, the expression 2 ⋅ (5 – 4) can be entered as 2 º y 5 Ã 4 º, without the ¸ key inserted between 2 and the left parenthesis.

Chain Calculations

To do a chain calculation, you don’t need to press Ï after each operation, but only at the very end.

For instance, to calculate	750⋅12	you can enter either:
	360

ALG: Summary C–5