1. Sequences • Digits
Lesson 1
Saxon Math 6/5
Facts Practice A

2. By the end of this lesson, you will know how to…
Sequences
Describe the rule for a sequence
Count up or down to identify missing terms in a counting sequence
Digits
Find the number of digits in a given number
Name the last digit of a given number

3. Facts Practice
100 Addition Facts

4. Mental Math
3 + 3

5. Problem Solving
The counting numbers are 1, 2, 3, 4, and so on. How many one-digit counting numbers are there?
Nine- 1, 2, 3, 4, 5, 6, 7, 8, 9

6. Sequences Counting by ones, we say…. 1, 2, 3, 4, 5, 6, …
These are counting numbers
Can also count by twos, fives, etc
An ordered list of numbers is a sequence
Each member of the sequence is a term

7. Sequences
Example: 1, 2, 3, 4, 5, 6, …
3 dots mean the sequence continues
Study a sequence to discover a pattern or rule
The rule is used to find more terms for the sequence

8. Sequences: Example 1
What are the next three terms in this counting sequence?
3, 6, 9, 12, 15, 18, 21, …
Solution:
The pattern is count up by threes. So the terms are…

9. Sequences: Example 2
Describe the rule for this sequence. What is the next term in the sequence?
56, 49, 42, 35, …
Solution:
This sequence counts down by sevens. So the term is…

10. Digits Our number system has ten digits
0, 1, 2, 3, 4, 5, 6, 7, 8, and 9
385
Has three (3) digits
Last digit is 5
148,567,896,094
Has twelve (12) digits
Last digit is 4

11. Digits: Examples The number 186,000 has how many digits?
Solution: Six digits
What is the last digit of 26,348?
Solution: The last digit is 8