This key facts covers What Are Integers and Decimals? within Integers & Decimals for GCSE Mathematics. Revise Integers & Decimals in Number for GCSE Mathematics with 14 exam-style questions and 22 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 2 of 13 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
What Are Integers and Decimals?
- Integers: Whole numbers including positive, negative, and zero (..., -2, -1, 0, 1, 2, ...)
- Decimals: Numbers with a decimal point showing parts of a whole
- Place Value: Each digit's position determines its value
- Decimal Places: Digits after the decimal point (tenths, hundredths, thousandths)
| Hundreds | Tens | Units | . | Tenths | Hundredths | Thousandths |
|---|---|---|---|---|---|---|
| 1 | 2 | 3 | . | 4 | 5 | 6 |
| 100 | 10 | 1 | 0.1 | 0.01 | 0.001 |
The number 123.456 = 100 + 20 + 3 + 0.4 + 0.05 + 0.006
Practice questions for Integers & Decimals
What is the value of the digit 4 in the number 12.345?
Explain how to multiply two decimal numbers without a calculator.
Quick recall flashcards
What is a decimal?
A number with a decimal point showing parts of a whole. The digits after the point represent tenths, hundredths, thousandths, etc.
Money calculation
£4.25 + £12.30 + £8.75
Line up decimals:
4.25
12.30
+ 8.75
------
25.30
Answer: £25.30