Sequences * Digits

Saxon 5/4 Lesson 3

New Concept: Sequences

▪ Counting numbers: 1,2,3,4,5,6…..

▪ Counting by twos: 2,4,6,8,……

▪ Counting by fives: 5, 10, 15,20, …………

▪ A counting pattern is a sequence.

▪ The dots at the end mean the sequence continues without an end.

▪ If we study the sequence we can find a rule for the sequence and find more numbers in it.

Video

Digits

▪ To write numbers, we use Digits.

▪ Digits are the numerals: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.

Warm Up

▪ G. One less than 24 is 23. What number is one less than 36?

▪ A. 20+20

▪ B. 23+20

▪ C. 43+ 10

▪ D. 24+30

▪ E. 50+30

▪ F. 10+65

Lesson Practice

▪ Write the rule and the next three numbers in the sequence.A. 10, 9, 8, 7, ___, ___, ___, …

B. 3, 6, 9, 12, ___, ___, ___, …

Find the Missing number in each pattern

C. 80, 70, ___, 50, …

D. 8, ___, 16, 20, 24, …

How many digits in each number? What is the last digit in each number?

E. 18 F. 5280 G. 8, 403,190 H. 19 I. 5281 J. 8,403,190

Mixed Practice

1. Blanca has 5 dollars, Susan has 6 dollars, and Britt has 7 dollars. Altogether, how much money do all three girls have?

3. How many digits are in each number?a. 593 b. 180 c. 186,527,394

5. 5 + M + 4 = 12 M=

7. Write the next three numbers in the counting sequence:10, 20, 30, ___, ___, ___, …

9. 40, 35, 30, 25, ___, ___, ___, …

Mixed Practice Continued

▪ Write the rule and the next three numbers in the sequence.

▪ 11. 6, 12, 18, ___, ___, ___, …

▪ 13. 4, 8, 12, ___, ___, ___, ….

▪ Find the missing number in each counting sequence:

▪ 15. 8, 12, ___, 20, …

▪ 17. 30, 25, ___, 15, …

▪ 19. How many small rectangles are shown? Count by two:

Mixed Practice…

▪ 21. Write a number sentence for the picture below:

▪ 23. 9 + 5+ 7+ 8= 25. 2 + 9+ 7+ 5

31 total problems