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# How to write numbers in standard form?

• Last Updated : 08 Dec, 2021

Exponents and powers are used to show very large numbers or very small numbers in a simplified manner. For example, if we have to show 2 × 2 × 2 × 2 in a simple way, then we can write it as 24, where 2 is the base and 4 is the exponent. The whole expression 24 is said to be power.

Power is a value or an expression that represents repeated multiplication of the same number or factor. Number of times the base is multiplied to itself is the value of the exponent.

For examples:

32 = 3 raised to power 2 = 3 × 3 = 9

43 = 4 raised to power 3 = 4 × 4 × 4 = 64

An exponent of a number represents the number of times the number is multiplied by itself. For example-  2 is multiplied by itself for n times:

2 × 2 × 2 × 2 × …..n times = 2n

The above expression, 2n, is said as 2 raised to the power n. Therefore, exponents are also called power or sometimes indices.

### General Form of Exponents

Exponent represents that how many times a number should be multiplied by itself to get the result. Thus any number ‘b’ raised to power ‘p’ can be expressed as:

bp =  {b × b × b × b × ….  × b} p times

Here b is any number and p is a natural number.

• bp is also called the pth power of b.
• ‘b’ is the base and ‘p’ is the exponent or index or power.
• ‘b’ is multiplied ‘p’ times, and thereby exponentiation is the shorthand method of repeated multiplication.

### Laws of Exponents

Let ‘b’ is any number or integer (positive or negative) and ‘p1’,  ‘p2’ are positive integers, denoting the power to the bases.

Multiplication Law: It states that the product of two exponents with the same base and different powers equals to base raised to the sum of the two powers or integers.

bp1 × bp2 = b(p1+p2)

Division Law: It states that if two exponents having the same bases and different powers are divided, then the results will be base raised to the difference between both powers.

bp1 ÷ bp2 = bp1/ bp2 = b(p1-p2)

Negative Exponent Law: If the base has a negative power, then it can be converted into its reciprocal but with positive power or integer to the base.

b-p = 1/bp

Basic Rules of Exponents

There are certain basic rules defined for exponents in order to solve the exponential expressions along with the other mathematical operations, for example, if there are the product of two exponents, it can be simplified to make the calculation easier and is known as product rule, let’s look at some of the basic rules of exponents,

Product Rule ⇢ an × am = an + m

Quotient Rule ⇢ an / am = an – m

Power Rule ⇢ (an)m = an × m or m√an = an/m

Negative Exponent Rule ⇢ a-m = 1/am

Zero Rule ⇢ a0 = 1

One Rule ⇢ a1 = a

### How to write numbers in standard form?

Solution:

Its difficult to read or understand numbers like 123456789000 or 0.0000002345678. To make it understand and easy to read large and small numbers,

we take their standard form.

Any number we can write as a decimal number, between 1.0 and 10.0, multiplied by a power of 10, is termed as standard form.

some examples of numbers in standard form.

1.89 ✕ 10¹³;  0.55 ✕ 10¹4

### Similar Questions

Question 1: How to write 500 in Standard Form?

Solution:

Here we have, 500

To find, the standard form of the number 500 = ?

By Multiplying and dividing 500 by 100, we get

= (500/100) × 100

= 5 × 102                        {Here only one number will be kept before decimal point that is 5}

Therefore the standard form of the number 500 = 5 × 102

Question 2: How to write 15 in the standard form?

Solution:

Here we have, 15

To find, the standard form of the number 15 = ?

By Multiplying and dividing 15 by 10, we get

= (15/10) × 10

= 1.5 × 101                        {Here only one number will be kept before decimal point that is 1}

Therefore the standard form of the number 15 = 1.5 × 10

Question 3: What is the standard form of 12346?

Solution:

Here we have, 12346

To find, the standard form of the number 12346 = ?

By Multiplying and dividing 12346 by 10000, we get

= (12346 / 10000) × 10000

= 1.2346 × 104                     {Here only one number will be kept before decimal point that is 1}

Therefore the standard form of the number 12346 = 1.2346 × 104

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