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Evaluate Arithmetic Expressions with the TI-84 Plus Calculator

Arithmetic expressions are evaluated on the TI-84 Plus calculator's Home screen. The Home screen is the screen you see when you turn the calculator on. If the Home screen is not already displayed on the calculator, press [2nd][MODE] to display it. If you want to clear the contents of the Home screen, repeatedly press [CLEAR] until the screen is empty.

Arithmetic expressions are entered in the calculator the same way you would write them on paper if you were restricted to using the division sign (/) for fractional notation. This restriction sometimes requires parentheses around the numerator or the denominator.

There is a major difference between the subtraction [–] key and the [(-)] negation key. They are not the same, nor are they interchangeable. Use the [–] key to indicate subtraction; use the [(-)] key before a number to identify that number as negative.

If you improperly use [(-)] to indicate a subtraction problem, or if you improperly use [–] to indicate that a number is negative, you get the ERR: SYNTAX error message. The use of these two symbols is illustrated in the last calculation.

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When entering numbers, do not use commas. For example, the number 1,000,000 is entered in the calculator as 1000000.

After entering the expression, press [ENTER] to evaluate it. The calculator displays the answer on the right side of the next line.

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