M2.1.3 For the adult

Counting on in big steps

I count on in 100s from 3 950. What number comes next?

What this chapter teaches

Counting on in tens, hundreds or thousands changes one place until it is full. Then it moves up: 990 + 10 is 1 000, not 9 100.

Three questions to ask

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

  1. What happens to the digits when you add 10 to 990? Why?
  2. Where would 3 700 sit on a line from 0 to 10 000? How do you know?
  3. What do you think comes after 1 990 when you count on in 10s?

After the chapter, the learner can

  • Count on and back in 10s, 100s and 1 000s
  • Mark 3 700 on a number line from 0 to 10 000

What they copy into their notebook

Count on in 10s, 100s or 1 000s. A full place moves up: 990 + 10 = 1 000. 3 700 sits past the middle of 3 000 and 4 000.

Back to the chapter