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How do you find the rule in a reducing pattern?

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How do you find the rule in a reducing pattern?

For example:

Find the Rule. What are the next 4 steps:

50, 40, 31, 23, 16…..

In this lesson you will learn about determining the rule in patterns that decrease by using a table.

Steps and Rules

Step 1

Step 2

Step 3

Step 4

Step 7

15, 13, 11, 9…..

RULE

-2

-2

-2

-2

When finding the rule in a pattern, don’t assume all patterns increase.

18, 15, 12, 9 ...

-3

-3

-3

-3

Use a table to check for the rule being used on the pattern.

Step 1

18, 15, 12, 9 ...

RULE

-3

-3

-3

-3

6

3

0

-3

-3

-3

-3

-3

-3

-3

Find the rule:

50, 40, 31, 23, 16…

-10

-9

-8

-7

RULE

10

5

1

Step4 -7

Step5 -6

Step7 -4

Step1 -10

Step2 -9

Step3 -8

Step6 -5

As the step increases, the amount subtracted reduces.

Inthis lesson you learned about finding the rule for decreasing patterns by using a table.

Find the rule. Find the next 3 numbers

33, 28, 23, 18…..

-5

-5

-5

-5

RULE

13

8

3

step6-5

step2-5

step3-5

step4-5

step5-5

step1-5

- Find the 7th number.
- 50, 48, 46, 44…
- Describe how you solved for the 7th step number.

- Find the next four numbers in the pattern.
- 42, 36, 30, 24…

What is the the next number in the pattern? 12, 10, 8, 6…

A) 2 B) 16 C) 20 D) 4

What are the next two numbers in this pattern?

100, 90, 81, 73….

A) 70, 80… B) 66, 65… C) 66, 60 D)55, 20