Functional Skills Qualification in Maths

Understanding and Using Whole Numbers

# Recognizing, reading and writing numbers

🤓 Study

📖 Quiz

Play audio lesson

Recognizing, reading and writing numbers

**Recognizing Numbers**

- Whole numbers, also known as integers, include zero and all positive and negative numbers without any fractional or decimal part.
- Roman numerals are an example of non-decimal numbers, such as
**I**,**V**,**X**,**L**,**C**,**D**, and**M**. - Number systems, such as binary and hexadecimal, are used in computer science. Binary numbers use only
**0 and 1**, while hexadecimal employs digits from**0 to 9**and letters from**A to F**.

**Reading Numbers**

- Understand the place value system when reading numbers. For instance, in the number 1234,
**1**is in the thousands place,**2**is in the hundreds place,**3**is in the tens place, and**4**is in the ones place. - Be able to read large numbers by breaking them into chunks of threes, starting from the right. The first group is hundreds, next is thousands, and then millions.
- Become familiar with number prefixes such as uni-, bi-/di-, tri-, quad, penta-, hexa-, hepta-, octo-, nona-, deca-.
- Know special names for numbers like
**zero**,**one**,**two**up until**twenty**, and then**thirty**,**forty**,**fifty**, going up in decades until**one hundred**.

**Writing Numbers**

- Always write numbers as simply as possible. Avoid writing out long complex numbers without good reason.
- Be consistent when writing out numbers – ensure to stick with either words or figures throughout a piece of writing.
- Understand the proper usage of hyphens when writing numbers between twenty-one and ninety-nine.
- If a sentence begins with a number, write it out in words, e.g.,
**Two hundred**people attended the event. - Use commas to separate every three digits from the right when writing large numbers, i.e., 1,000; 20,000; 300,000; 4,000,000.
- Place a zero in front of a decimal if the number is less than one, such as
**0.25**instead of**.25**. - Develop the ability to express numbers in scientific notation using powers of ten, this helps to write extremely large or small numbers in a concise way.