Assessment of basic addition combinations where both addends are 0 through 10, and the sum is 20 or less. Includes 121 unique facts from 0+0 to 10+10.
The ability to recall basic addition facts quickly and accurately without counting or calculating, typically within 2-3 seconds per fact.
Standardized assessment typically featuring 20-100 problems completed in 2-5 minutes, depending on grade level and objectives.
Groups of related facts using the same numbers. Example: 7+5=12, 5+7=12, 12-7=5, 12-5=7.
20-100 problems
2-5 minute time limit
All facts 0-10
95% accuracy goal
2-3 seconds per fact
Automatic recall
95% accuracy
Instant recognition
A + B = B + A, reducing the number of facts to memorize from 121 to approximately 66 unique combinations.
(A + B) + C = A + (B + C), useful for adding three or more numbers.
A + 0 = A, any number plus zero equals the same number.
- Start with zeros and ones: Easiest facts to master
- Learn doubles: 1+1, 2+2, 3+3, etc.
- Master near-doubles: 6+7, 8+9 (one more than doubles)
- Use making ten: 8+5 = 8+2+3 = 10+3 = 13
- Count on: Start with larger number and count up
• Confusing addition with subtraction
• Forgetting to memorize facts thoroughly
• Relying too heavily on counting instead of recall
• Not practicing both orders of addends
• Mixing up similar-looking facts
Category: Zeros fact
Rule: Identity property (A + 0 = A)
Expected Time: 1-2 seconds
Strategy: Any number plus zero equals the same number
- Recognize this as a zeros fact
- Apply the identity property: 0 + 7 = 7
- Verify: Starting with 0, adding 7 gives 7
- Record answer quickly and move on
This is a zeros fact (adding zero to any number)
Identity property: 0 + 7 = 7
Write "7" quickly and proceed to next problem
Don't linger on easy facts - use speed to save time
0 + 7 = 7
• Identity Property: A + 0 = A
• Speed Requirement: Answer within 1-2 seconds
• Pattern Recognition: Zeros facts are easiest to remember
Category: Doubles fact (same number added to itself)
Strategy: Double the number (6 × 2 = 12)
Expected Time: 2-3 seconds
Learning Tip: Doubles are easier to remember and support near-doubles
This is a doubles fact (same number added to itself)
Double the number: 6 × 2 = 12
Count: 6, 7, 8, 9, 10, 11, 12
Write "12" and proceed to next problem
6 + 6 = 12
• Doubles Strategy: Any number added to itself is doubled
• Pattern Recognition: A + A = 2A
• Foundation Building: Doubles support near-doubles facts
Category: Near-doubles fact (consecutive numbers)
Strategy: Use doubles fact and add one more
Expected Time: 2-3 seconds
Learning Tip: Build on known doubles facts
This is a near-doubles fact (7 and 8 are consecutive numbers)
7 + 7 = 14 (known doubles fact)
Since 8 is one more than 7, add 1 to the doubles result
14 + 1 = 15, so 7 + 8 = 15
7 + 8 = 15
• Near-Doubles Strategy: Use doubles + 1
• Building on Known Facts: Extend what you already know
• Number Sense: Understanding relationships between numbers
A + B = C (where A,B ≤ 10, C ≤ 20)
Accuracy × Speed = Fluency
(0+0 through 10+10)
WORK QUICKLY, SKIP DIFFICULT PROBLEMS, RETURN LATER!
• Week 1: Focus on doubles and easy facts
• Week 2: Practice near-doubles and making ten
• Week 3: Mixed practice and timed drills
• Week 4: Full-length practice tests
• Day before: Light review only