To complete this lesson, complete the following tasks:

1. Study the lesson for mastery.

2. Memorize the lesson that it may be recited.

3. Complete the lesson assessment.

## Lesson

1. What do we call nine units and one more?

**Nine units and one more are called “ten”.**

2. How is the number ten like the number one?

**Like the number one, the number ten is also represented by the figure 1.**

3. How does the number ten differ from the number one?

**For the number ten, the one is made to occupy the second place from the right, by writing a 0 in the units’ place.**

4. How is one ten written with characters?

**One ten is written 10.**

5. What do we call two tens?

**Two tens are called “twenty”.**

6. How are two tens written with characters?

**Two tens are written 20.**

7. What do we call three tens?

**Three tens are called “thirty”.**

8. How are three tens written with characters?

**Three tens are written 30.**

9. What do we call four tens?

**Four tens are called “forty”.**

10. How are four tens written with characters?

**Four tens are written 40.**

11. What do we call five tens?

**Five tens are called “fifty”.**

12. How are five tens written with characters?

**Five tens are written 50.**

13. What do we call six tens?

**Six tens are called “sixty”.**

14. How are six tens written with characters?

**Six tens are written 60.**

15. What do we call seven tens?

**Seven tens are called “seventy”.**

16. How are seven tens written with characters?

**Seven tens are written 70.**

17. What do we call eight tens?

**Eight tens are called “eighty”.**

18. How are eight tens written with characters?

**Eight tens are written 80.**

19. What do we call nine tens?

**Nine tens are called “ninety”.**

20. How are nine tens written with characters?

**Nine tens are written 90.**

21. What does a figure represent when it stands in the second place from the right?

**When a figure in a number stands in the second place from the right, it represents one or more units of the second order.**

22. What do we call units of the second order?

**Units of the second order are called tens**

23. What do we call the place occupied by units of the second order?

**The place occupied by units of the second order is called the tens’ place.**

## Assessment

**Modern Arithmetic III, Article 04 Exam**