Three to get started (with the answers)

A printable sheet of simultaneous equations

**Standard Form Questions**

Practice and check the answers standard form

These instructions work on a CASIO fx-83GT PLUS, which is widely used in schools and will, if you learn to drive it with confidence, do a tremendous number of different sorts of Maths.

If you want the **calculator to give all its answers in standard form**, follow this sequence:

- shift mode 7
- it will offer you a choice of Sci 0~9 and this means how accurately it will display the answers. 3 is OK, but you might want to experiment with 4 and 5 as well, to see for yourself what difference it makes.
- Try it, type in 23×3000= and you will get 6.90×10^4 (sorry! the ^ means to the power!!! The calculator is designed to display Maths properly and computers aren’t)
- To make your calculator display your answers normally again, shift mode 8 1 will do the trick. mode 8 is “Norm”, normal mode.

To** type in a number that is in standard form,** for example 4.5 x 10^12, use the button with x10x on it (it’s in the middle of the bottom row of buttons, and I will use square brackets to mean button) so the keystrokes you need, are 4.5 [x10x]12

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