M3.3.4 For the adult

Tenths, hundredths and thousandths

Is 0.45 bigger than 0.5, because 45 is bigger than 5?

What this chapter teaches

The place of a digit after the decimal point tells what it is worth: tenths, hundredths, thousandths. A longer decimal is not a bigger decimal. To compare, the learner lines up the places and compares from the left. Some places write a comma instead of the point, and a comma can also group thousands.

Three questions to ask

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

  1. What is the 7 worth in 3.472?
  2. Which is bigger, 0.5 or 0.45, and how can you show it?
  3. Why must the 0 stay in 3.05?

After the chapter, the learner can

  • Say what each digit in 3.472 is worth
  • Read 3.47 and 3,47 as the same number
  • Order decimals like 0.5, 0.45 and 0.405

What they copy into their notebook

Each place to the right of the point is ten times smaller. Tenths, hundredths, thousandths. Compare place by place from the left. 3,47 is 3.47.

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