How do you write 100 in scientific notation? In scientific notation, the letter E is used to mean “10 to the power of.” For example, 1.314E+1 means 1.314 * 101 which is 13.14. Scientific notation is another way to write a number. But when used in displaying large or small numbers, e means “times ten to the power of…”. Note that in other contexts, e = 2.71828183, the base of natural logarithms. This is simply a shortcut way to enter very large values, or tiny fractions, without using logarithms. When you enter a number in scientific notation, the TI-84 Plus CE does not automatically display answers in scientific or engineering notation.
 stands for “x10” and the calculator interprets the entire number as (123.45 x 10-2) as if it was entered with parentheses. Pressing and holding both the “DISP” and “Correct” button at the same time will turn off the calculator.
