Casio Fx82tl Manual
Here you can view all the pages of manual Casio Fx82tl Manual. The Casio manuals for Calculator are available online for free. You can easily download all the documents as PDF.
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6 Mastering the Calculator using the Casio fx-82TL Example 348 – 24 – 19 The keystrokes are The display should read 305. Sometimes you may have a sum like this: -7 + 4 You can use the key. The key strokes are The display should read -3. You could also use the keystrokes In this case the calculator recognises the – as a negative (not recommended to do it this way).
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Mastering the Calculator using the Casio fx-82TL 7 2. Multiplication and division 2.1 To multiply numbers Find the key (it is shown on the photograph of your calculator here). Example To multiply 7 and 3, type The display should read 21 To find 753 × 492, type The display should read 370 476 key for division key for multiplication
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8 Mastering the Calculator using the Casio fx-82TL 2.2 To divide numbers Find the key (it is shown on the photograph of the calculator) Example To divide 35 by 7, type The display should read 5 To divide 7 905 by 85, type The display should read 93 To divide 56 by 23947 type The display should read 0.002338497 If it reads 2.3385×10- 03 or something similar, then your calculator is in SCI (Scientific mode). See page 2 to change to NORM (normal mode). 2.3 Combining multiplication and division Example If...
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Mastering the Calculator using the Casio fx-82TL 9 3. Brackets Find the set of bracket keys on your calculator. The fx-82TL allows you to use many sets of brackets. Example Do the calculation 471 – (93 + 11 + 2) on the calculator. (Make sure your calculation is in ordinary comp. mode press ) The keystrokes required are The display should read 365. Sometimes in calculations you will see other grouping symbols, for example, { } (called braces), [ ] (called square brackets). LH bracket keyRH bracket key
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10 Mastering the Calculator using the Casio fx-82TL Try these examples: Exercise 1 (a) 25 + (7 + 2 – 4) (b) 18 (3 + 7) [a multiplication sign is understood 18 × (3 + 7)] (c) 4 + 5 [2 (3 + 7)] [to use two sets of brackets just press the same button] (d) Answers: 30; 180; 104; 1 4. Powers 4.1 Squaring and higher powers 62 means 6 × 6. You can use the square key to do this calculation. (It is shown on the photograph of your calculator here.) Press the display should read 36. Or you can use the power key...
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Mastering the Calculator using the Casio fx-82TL 11 Find the xy key on your calculator. Example To square 6, that is, find 62, type The display should read 36 [The first number you put in is the 6. This is the x and the second number you put in (2) is y. That is why it is called the xy key.] To find 273 the required key strokes are and the display should read 19683. If you have learnt your multiplication tables you will already know the squares of the whole numbers from 1 to 12 and thus be able to...
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12 Mastering the Calculator using the Casio fx-82TL Exercise 3 You can use this key for other powers as well. Try these examples (a) 74 (b) 810 (c) (0.4)6 (you do not have to type the brackets in) (d) (–7)6 (you need to type the brackets in) (e) 50.4 (f) 5–4 __________________________________________________________________________ Answers: (a) 2401 (b) 1073741824 (c) 4.096 × 10–3 or 0.004096 (you move the decimal 3 places to the left) (d) 117649 (e) 1.903653939 (f) 0.0016 [Just press 5–4 is the same...
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Mastering the Calculator using the Casio fx-82TL 13 What do you think is? = __________________________________________________________________________ You should have said 9 because 92 = 81 (Check your calculator) __________________________________________________________________________ What do you think will be? You should have said ‘you can’t find the square root of a negative’ since you can’t find a number that squares to give a positive. Your calculator will say Ma ERROR. Exercise 4 Try these...
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14 Mastering the Calculator using the Casio fx-82TL Exercise 5 Complete the following without using the calculator (a)= (b)= (c)= (d)=10 (e)=625 (f)=144 (g)=, because 82= (h)=, because = 121 (i)=, because = Check your answers on the calculator. __________________________________________________________________________ 4.3 Other roots You can also use the root key on the calculator. Find the on your calculator. To get to this key you must press shift first. 72 72 102 2 2 2 64 121 225 root key shift key
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Mastering the Calculator using the Casio fx-82TL 15 Look at the examples below. Examples (a) 9½ and the display should read 3. or and the display should read 3. (b) and the display should read 2. (c) 16¼ and the display should read 2. Note: Root key is a function at the back of the power key, so you will need to activate it with the SHIFT key See the key . The x stands for the root you want to take so it is typed first. From the examples above you may have seen that . is called a fractional...