Decimals

Hong Kong

Stage 1

Lesson

Partitioning numbers means breaking numbers down in to two or more parts (or splitting them into smaller units).

There are different ways of partitioning a decimal number. For example, 0.513 is equal to

- 5 tenths, 1 hundredth and 3 thousandths (0.5 + 0.01 + 0.003)
- 5 tenths and 13 thousandths (0.5 + 0.013)
- 2 tenths, 31 hundredths and 3 thousandths (0.2 + 0.31 + 0.003)

Let's start with a video.

Remember!

If we think of a block as the ONE... then what fraction of a block is a flat?

- $\frac{1}{10}$110 because 10 flats = 1 block. [This can also be written as 0.1]

If we think of a block as the ONE... then what fraction of a block is a long?

- $\frac{1}{100}$1100 because 100 cubes = 1 block. [This can also be written as 0.01]

If we think of a block as the ONE... then what fraction of a block is a cube?

- $\frac{1}{1000}$11000 because 1,000 cubes = 1 block. [This can also be written as 0.001]