The Casio fx-92B Spéciale Collège along with its sister calculator, the French-labeled fx-92, are calculators designed for the European market. Arguably, the fx-92B may be for the Belgian market due to the languages which are avilable, which include English, French and Dutch. It is similar in design to the Casio Classwiz, but with less features avialable than the fx-991EX model. The modes available from the menu include the standard Calculate mode, Statistics, Table and Equation mode, with a linear simultaneous equation solver.

In addition, the fx-92B has the Verify mode, absent from the 991-EX standard model, but present in both the German and Iberian version of the Classwiz, and Ratio mode. The ratio mode differs slightly from the Classwiz version as it is presented as equivalent fractions rather than comparable ratios.

One of the unique features is the ability to switch off the automatic simplification of fractions. You can input a fraction and use it in its unsimplified version, but you can also use the SIMP feature to simplify the fraction and reveal the factor by which both numerator and denominator were divided.

The calculator also has the saught after GCD (HCF) and LCm functions avilable, although take care to use the semi colon (;) between your values. The comma (,) is treated as a decimal point on this calculator.

This video features a review of the key features of the HP10s+ calculator.
It includes looking at the different modes available from the Mode menu, inputting and changing between decimal and fraction answers, percentages, indices or exponents and a brief look at the DEL and π key. The HP10s+ has three modes to complete calculations with. COMP or computational mode for general calculations. and then two statistical modes, one for standard deviation and one for regression.

As with many other models of calculator, you can switch the angle units between degrees, radians and the lesser used gradians. You can alter how numbers are displayed, including switching between decimal and scientific notation and display mode lets you change between displayingan improper fraction or a mixed number in the first instance.

One of the best features of the HP10s+ is that if you are working with decimal numbers then you will get a decimal answer in the first instance.

The fraction button enables you to switch this to a fraction answer if required. The reverse is also true. Input fractions or mixed numbers and you get a fraction (or mixed number) answer in the first instance.

The percentage button is a little trickier. It is best to input a percentage sign at the end of your percentage calculation to get the correct answer. This may be due to the % function being coupled with the equals button.

Additionally, it is possible to input a mixed number. This is possible by pressing SHIFT and then the fracttion button. Again the icon above the fraction button demonstrates this. You have to input the integer component first and then navigate to input the numerator then denominator of the fraction. You are then able to use this mixed number in your calculations.

The next example is one third. If you use SD to switch to a decimal, you get a recurring decimal in the first instance. This is 0.3 with a dot above the recurring part, in this case the 3. On some models, particularly the US model of this calculator, the 300ES Plus, have a line above the recurrence instead of a dot. Press SD again and you get a full calculator display decimal approximation.

You can change surds or radicals to decimals as well. If you input a surd such as √5 and press equals, the calculator will repeat that surd back to you. This is beacuase it presents the exact answer in the first instance. If you press SD then you get a full calculator display decimal approximation. The calculator also automatically simplifies surds. For example...

√20 = √4 x √5 = 2 x √5 = 2√5

The calculator will do this simplification automatically and then you can press SD to get a decimal answer. The calculator also gives exact answers involving π in the first instance. You need to press SD if you would like a decimal approximation that you can round.

You might notice in the video I sometimes refer to a decimal approximation. When you have an irrational decimal number (a decimal number that doesn't end), the number will be rounded to the full calculator display. This will only ever be an approximation, but two about 9 decimal places, so this is usually accurate enough for most calculations you may encounter at GCSE or A level maths.

If you are new to using a Casio natural display calculator such as the fx83GTPLUS or fx85GTPLUS, then this video is a great place to start learning how to use all the features and functions of the calculator. One of the huge advantages of a natural or textbook display is that fractions appear similar to as they appear in a textbook, or as you would write them with the numerator above the denominator. This makes it nice and clear to those inputting a calculation involving fractions what number is on the top and on the bottom, a problem encounter with a linear display all on one line.

Additionally the video explores how convenient the ANS function is in multi stage calculations. You can use an answer from a previous calculation in your next one. This is helpful for completing more complex calculations one step at a time. Brackets or parentheses are also explored, proving a useful way of completing an addition or subtraction before a multiply or divide. The natural display comes into use again when completing calculations with powers or exponents and roots, raising the index number into superscript, doing away with the need for the ^ symbol to indicate a power.

The video also features the Delete or DEL function, which operates like a backspace on a computer. If you make an input error, it is very tempting to press AC and clear your whole calculation. The DEL key enables you to delete and input value or function and this can be combined with the navigation key to go back and delete anything. Just move your cursor to a position just after what you want to delete and press DEL.