![]() Proper fraction button and Improper fraction button work as pair. If the fraction of decimal is part of a calculation, omit clicking equals and continue with the calculation. Click the fraction format button, enter a decimal, click equals and then click on a fraction form and then click equals. Also to change a decimal of the form 0.5 to the fraction 1/2, or change a decimal of the form 1.75 to a mixed number of the form 1 3/4 or to the fraction 7/4, or a fraction of the form 7/4 to the mixed number 1 3/4. 3/4 DEC x 6 =.įraction format button is used to work with all fractions. If the fraction or mixed number is only part of the calculation then omit clicking equals and continue with the calculation per usual. Click on the decimal format button, enter a fraction or mixed number, then click equals. Also to change a fraction of the form 3/4 to the decimal 0.75, or a fraction of the form 7/4 or a mixed number of the form 1 3/4 to the decimal 1.75. Decimal format button is used for all decimal work. When you choose the one the other is switched off. Space, click another number and then click on the fraction bar button, lastly enter another number.ĭecimal format button and Fraction format button work as pair. You can use fraction space button to create a number of the form 5 3/4. Click a number and then click fraction bar, then click another number. * Contracted survey conductor: ASMARQ Co., Ltd.Ĭurves are incorporated into the design to give the calculator a natural, rounded look, and ripple-patterned grooves added to the back of the case provide a great grip.To enter a fraction of the form 3/4. In trials using prototypes, 83% of users reported “Easier key input than conventional calculators.*” This provides an ideal fit for the fingers of the right hand and allows the calculator to be used with a natural hand position. The all-new Ergonomic Step Keys structure was developed in response, arranging the keys in a step configuration to maintain the vertical keystroke direction. Analysis revealed that, even when using a sloped calculator, however, the keystroke direction stayed vertical. ![]() After testing slopes of up to 9°, the developers arrived at 3°. Beyond delivering easy key input, the designers were also careful to ensure that the new shape still appeared fitting for a calculator. A focus on the discovery that people’s hands tend to angle outward when they use a calculator then led to a new design with the keypad surface sloped to the right. This included the movements and positions of hands and fingers, the direction in which keys are pressed, and the amount of muscle activity. Casio worked with Japan’s National Institute of Advanced Industrial Science and Technology to analyze what happens to the hand and fingers when people use a calculator. Surveys on how people use calculators and what needs they have led Casio to focus on users who do key input with three to five fingers of their right hand, and the case and key design was optimized for them to facilitate ease of key input. ![]() The new JE-12E and DE-12E Ergonomic Calculators are the product of a unique Casio vision: “Making the calculator fit the person, not the person fit the calculator.” Casio applied ergonomic expertise to create an innovative new case and key design, delivering an ideal fit in the hand and making key input easy. ![]() announced today the release of two new Ergonomic Calculators, the JE-12E and DE-12E, both featuring keypad surfaces sloped 3° to the right and keys arranged in a step configuration to facilitate ease of key input using the right hand.
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