Tenths and the decimal point

What this chapter teaches

One tenth is 1/10 and is written 0.1. In 1.5 m the 5 after the point means 5 tenths of a metre, which is 50 cm. Many countries write a comma where others write the point, and the number is the same.

Three questions to ask

There is no one right wording. Listen for the idea.

1. What does the 5 mean in 1.5 m?
2. Which is longer, 1.5 m or 1 m 5 cm, and how do you know?
3. If a tape says 2,4 m, how long is that in metres and centimetres?

After the chapter, the learner can

• Read 0.1 as one tenth, the same as 1/10
• Write 1 m 50 cm as 1.5 m
• Read 1.5 and 1,5 as the same number, written two ways