Complete addition patterns
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Complete addition patterns: skill guide
| Objective | This practice develops complete addition patterns through a focused sequence of problems. |
|---|---|
| Grade | Grade 1 |
| Standard | CCSS.MATH.CONTENT.1.NBT.C.5 |
| Difficulty | Developing · Abstract |
| Representation | Number sequence, Numerical equation |
| Practice format | Interactive, account-free practice with immediate feedback |
Objective
This practice develops complete addition patterns through a focused sequence of problems.
What this practice covers
This practice develops complete addition patterns through a focused sequence of problems. Early questions keep the representation direct, while later questions vary the number placement or remove visual support. Learners connect quantities, equations, and efficient number relationships instead of relying on isolated memorization.
Standards alignment
Supports Common Core: CCSS.MATH.CONTENT.1.NBT.C.5 — Given a two-digit number, mentally find 10 more or 10 less.
Who it’s for
This practice is designed for Grade 1 learners building fluency with numbers through 100. It is also useful for older learners who benefit from a concise visual review before working with abstract equations.
What to know first
- Learners should count reliably, read two-digit numerals, and understand addition as joining parts. Visual models remain available where they clarify tens, ones, or crossing a ten.
Difficulty and scaffolding
Developing · Abstract stage
Problem representations
- Number sequence
- Numerical equation
Three worked examples
- Ten more than 24 is 34: 24 + 10 = 34.
- Two tens and 5 ones make 25: 20 + 5 = 25.
- In 15, 25, 35, each number is 10 more than the one before it.
Likely misconceptions
- Learners may change the ones when adding ten, count on by one instead of by ten, or read the sequence in the wrong direction. Compare two neighbouring numbers, name the step, and check that the same step holds across the whole pattern.
Hints and explanations
- Ten more than 24 is 34: 24 + 10 = 34.
- Two tens and 5 ones make 25: 20 + 5 = 25.
- In 15, 25, 35, each number is 10 more than the one before it.
What to practice next
Continue from adding ten to a numeral toward mental place-value reasoning, using the same ten-more step across larger numbers.
Editorial review
Reviewed by Brilliant’s curriculum team. Exercises are generated within defined difficulty ranges and checked against verified answer rules.
Complete addition patterns FAQs
What is the goal of complete addition patterns?
The goal is accurate reasoning with an efficient strategy. A learner should be able to explain what each number represents and use the visual or number relationship without unnecessary recounting.
Should this practice be timed?
No timer is required. First build accurate, understandable strategies. Speed usually improves naturally as learners recognize groups of ten, familiar facts, and repeated patterns.
What should a learner do after a mistake?
Rebuild the problem with the visual, name each part, and check the result using the inverse relationship. A short explanation is more valuable than immediately repeating the same guess.
How many problems should be completed at once?
The full set contains 15 problems, but a learner may pause when attention drops. A short, successful session with clear reasoning is more useful than rushing through a longer set.