Chapter 1: Getting Started

When you reverse the keyboard, the following settings are automatically changed.

Basic → Advanced

• Simplifying: Auto (Auto at SIMPLE in SETUP menu)

Advanced → Basic

•Coordinate system: Rectangular coordinates (Rect at COORD in SETUP menu.)

•Answer mode: Displays a mixed number if ANSWER is set to complex numbers.

•Angle unit: Set to Deg if DRG is set to Grad.

•Decimal format: Set to FloatPt if FSE is set to Eng.

Quick Run-through: Basic Mode

Here are the major ingredients for 18 doughnuts:

1

4 cup warm water

3

4 cup warm milk

1

3 cup sugar

4 cups all-purpose flour

2 eggs

3 tablespoons butter

Based on these values, solve the following problems using the calculator.

Question If you make 60 doughnuts according to the above recipe, how many cups of warm milk are required?

At first, you may calculate how many cups of warm milk are required for 1 doughnut =

34 ÷ 18

As for the ordinary calculator, the answer is 0.041666666. But how much is 0.04166666 of a cup of warm milk? The Basic mode of this graphing calculator is initially set to the fraction answer mode instead of the decimal answer mode. You may easily obtain the answer in fraction.

10

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Sharp EL-9900 operation manual Quick Run-through Basic Mode, Basic → Advanced, Advanced → Basic
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EL-9900 specifications

The Sharp EL-9900 is a remarkable scientific calculator that exhibits a fusion of advanced features, cutting-edge technology, and an ergonomic design tailored for both students and professionals. One of the standout characteristics of the EL-9900 is its extensive range of functions, boasting over 550 built-in calculations that cover various mathematical and scientific disciplines. This calculator is particularly popular among engineering and physics students due to its ability to handle complex calculations with ease.

One of the key features of the EL-9900 is its 2-line display, which allows users to view both the input and the result simultaneously. This dual display enhances usability, especially when dealing with intermediate steps in calculations. The calculator also includes a built-in 12-digit LCD screen, which ensures clarity and precision in reading numbers, making it easier for users to work for extended periods without straining their eyes.

The EL-9900 is equipped with a wide array of mathematical functions, including trigonometric, logarithmic, and exponential functions. Notably, it supports fraction calculations, statistical analyses, and unit conversions. Its advanced programming capabilities, such as 36 programmable functions and the ability to store data, further enhance its functionality, allowing users to create custom calculations tailored to specific needs.

One of the more modern technologies incorporated into the EL-9900 is its solar-powered function, which is complemented by a battery backup, ensuring that the device remains operable in varied lighting conditions. This environmentally friendly design reduces the need for frequent battery replacements, making it a cost-effective choice for users.

In terms of design, the Sharp EL-9900 boasts a slim profile and lightweight construction, which makes it portable and easy to carry. Its durable casing ensures that it can withstand the rigors of daily use, whether in a classroom setting or a professional environment.

Overall, the Sharp EL-9900 stands out as a versatile scientific calculator packed with features designed to meet the needs of students and professionals alike. Its robust functionality, clear display, and user-friendly design make it a reliable tool for anyone engaged in mathematical and scientific pursuits. Whether used for basic calculations or advanced problem-solving, the EL-9900 remains a powerhouse in the realm of scientific calculators.
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