Test M VS X Directions: Read each sentence carefully and write ✓ if the statement is correct; write x if it is wrong. 1. The mathematical expression 5x5x5x5 can also be written as 5. This method of writing is known as Exponential Notation 2. In the preceding example, 54 was shown. The base in the given numbers is 4. 3. The number that is used to multiply by itself is called the base. 4. Zero-power rule: any non-zero number raised to zero (0) is always equal to 1. 5. When you multiply a number by itself several times, you can use an exponent to write the exponential notation. 6. We can use the symbol dot (between factors to indicate the process of multiplication. 7. If the exponent is equal to 1, it means that the base is used as a factor once. Therefore, it stands alone. 8. Is 72 = 2.2.2.3.3 is equal to 72 = 23.32 9. The exponent is a number placed on upper right of a base which gives a power to the base to multiply itself by its number on the indicated number of the exponent. 10. The expanded form of 23 is 2 x 3 x 3 x 3.