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HH.1 Find the groups and count

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What are addition patterns?

Addition patterns are number patterns that appear when we add the same number repeatedly or follow a sequence. They help us notice relationships between numbers and make adding easier.

Examples:
  • 2 + 2 = 4, 4 + 2 = 6, 6 + 2 = 8 β†’ The pattern is counting by twos.
  • 5 + 10 = 15, 15 + 10 = 25, 25 + 10 = 35 β†’ The pattern is adding tens.
Note

Patterns in addition are like β€œshortcuts.” Once you see the rule, you can continue the sequence quickly.

How to identify addition patterns

To identify an addition pattern, look for the number that repeats in each step. This repeated number is the β€œrule” of the pattern.

Steps:
  • Look at the numbers in the sequence: 3, 6, 9, 12
  • Find what is changing: each number goes up by 3
  • Identify the rule: add 3 each time
Note

If the numbers increase the same way each time, you have found the pattern.

Common addition patterns you should know

Some patterns appear often in math. Learning them helps with adding and understanding place value.

Addition Pattern List:
  • Counting by ones: 1, 2, 3, 4, …
  • Counting by twos: 2, 4, 6, 8, …
  • Counting by fives: 5, 10, 15, 20, …
  • Counting by tens: 10, 20, 30, 40, …
Note

Skip-counting is a type of addition pattern. Each jump is the same size.

Using addition patterns in math

We use addition patterns to solve problems faster. They help us see groups of numbers and predict what comes next.

Examples:
  • β€œI have 5, 10, 15, 20 marbles.” β†’ The pattern is adding 5 each time.
  • β€œThe clock shows 3, 6, 9, 12.” β†’ The pattern is adding 3 hours each time.
  • β€œ10, 20, 30, 40 pencils are in the boxes.” β†’ The pattern is adding 10 each time.
Note

If you know the rule of the pattern, you can find numbers that come later without adding one by one.