What do you understand by 30?
30 in words is written as ‘T-H-I-R-T-Y’. Mathematically, 30 is a number that has a significant value. In real life, 30 can be used as a count of objects. 30 is used for various mathematical operations, such as addition, subtraction, multiplication and division.
Use of a Number Thirty in Real life
Here are some examples where we use 30 in real life:
- There are 30 students in Melissa’s class.
- Sam bought 30 chocolates for his friends.
- The Albert family drove 30 miles for a weekend trip.
How to write 30 in Words?
30 in words is written as ‘thirty’.
How to represent 30 in the Place Value Chart?
As you can notice, 30 is a two-digit number. Hence, in the place value chart, 30 will take the place of 2 digits starting from the left of the number, ones and tens place value. The place value of digits begin from right to left and is represented in the following format:
Now, let us represent 30 in a place value chart.
Tens | Ones |
|---|---|
3 | 0 |
Here, 0 is in the ones place and 3 is in the tens place.
Solved Examples
Example 1: Write down 30 in expanded form as per the place value chart.
Solution: As we know, 30 is a two-digit number, the place value for its digits will be ones and tens.
Tens | Ones |
|---|---|
3 | 0 |
During the expansion of a number we multiply 1 with ones place digit, 10 with tens place digit, 100 with hundred place digit and so on.
Here 0 is in ones place and 3 in tens place
3 x 10 + 0 x 1
30 + 0
So, the expanded form of 30 is 30 + 0.
Example 2: Robyn reads one page of her storybook everyday. How many pages will she read by the end of the month?
Solution: Robin reads 1 page everyday.
Let us assume that the month has 30 days (most of the months in our calendar have 30 days)
Thus, we can count the number of pages for 30 days of the month and that will give us 30 pages as the answer.
So, Robin will read 30 pages in a month.
Example 3: Angela bought 12 toys, Jena bought 7 notebooks, and Susan bought 11 dresses. They donated these items to an orphanage. Can you find out the total number of items donated?
Solution: Here, we have to find the total of the items that Angela, Jena and Susan bought. Given, there are 12 toys, 7 notebooks, and 11 dresses.
We have to add them together to find the total.
Total items = 12 + 7 + 11 = 30
Hence, 30 items were donated.
30 is an even number as it is divisible by 2 without leaving any remainder.
30 is used for representing the mathematical quantity or for counting purposes. Along with that, 30 is a whole number, natural number, even number, composite number and a real number.
30 is written in words as ‘thirty’.
In number 30, ‘3’ is located in the tens place, and has a place value of 3 tens.
No, 30 is not a prime number as it has more than two factors and prime numbers don’t have more than two factors.