First lessons of Arithmetic: Lesson V. - simple addition 9

In this lesson you will practice writing the figure 9, count 9 and add to 9.


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WIKI: The most familiar numbers are the natural numbers or counting numbers: one, two, three, and so on.
In the base ten number system, in almost universal use today for arithmetic operations, the symbols for natural numbers are written using ten digits: 0, 1, 2, 3, 4, 5, 6, 7, 8, and 9. In this base ten system, the rightmost digit of a natural number has a place value of one, and every other digit has a place value ten times that of the place value of the digit to its right.

Lessons in this series:

• Introduction and Lesson I
• Lesson II.
• Lesson III.
• Lesson IV.
• Lesson VI
• Lesson VII.
• Lesson VIII.
• Lesson IX.
• Lesson X.
• Lesson XI.
• Lesson XII
• Lesson XIII.
• Lesson XIV.
• Lesson XV.