Decimals: Tenths
Introduce decimal tenths as another way to write fractions with a denominator of 10.
What You Need to Know
Key Concept Diagram
One tenth is written as 0.1 or 1/10; ten tenths equal one whole.
The decimal point separates the whole number part from the fractional part.
On a number line, 0.1, 0.2, … 0.9 sit between 0 and 1 at equal spaces.
Tenths appear in everyday measures: 2.5 cm is two and five tenths centimetres.
Key Vocabulary
decimal point
The dot that separates the whole number from the fractional part in a decimal.
tenth
One of ten equal parts of a whole; written as 0.1 or 1/10.
place value
The value of a digit based on its position in a number.
tenths column
The first column to the right of the decimal point.
Knowledge Check
Select the correct answer for each question. Click "Check Answer" to see if you are right.
Question 1
How is 3/10 written as a decimal?
Question 2
Which decimal is closest to 1 whole?
Question 3
What is 0.4 + 0.3?
Key Concepts Summary
- ●One tenth is written as 0.1 or 1/10; ten tenths equal one whole.
- ●The decimal point separates the whole number part from the fractional part.
- ●On a number line, 0.1, 0.2, … 0.9 sit between 0 and 1 at equal spaces.
- ●Tenths appear in everyday measures: 2.5 cm is two and five tenths centimetres.