write a doubles plus one fact for the sum of 7
The Correct Answer and Explanation is:
A doubles plus one fact for the sum of 7 is:
3 + 4 = 7
Explanation
In basic addition, a “doubles fact” is when the same number is added to itself, such as 3 + 3 or 4 + 4. These are important for early math learners because they form a foundation for understanding other types of addition. A “doubles plus one” fact is when you take a doubles fact and increase one of the numbers by 1. This strategy helps make addition faster and easier to do mentally.
To find a doubles plus one fact for the sum of 7, we look for two numbers that are next to each other (consecutive numbers) and add up to 7. When we try 3 + 4, we see that it equals 7. This is a doubles plus one fact because:
- The double is 3 + 3 = 6
- Then, add 1 more to make 3 + 4 = 7
This is useful because if you already know that 3 + 3 equals 6, then adding just one more gives you 7 quickly. It helps improve mental math skills by building on known facts.
Another way to think of it is this: when children learn the doubles facts, they can then easily use them to figure out nearby problems without starting from scratch. For example, if a student sees 3 + 4, they might think, “I know 3 + 3 is 6, and 4 is just one more than 3, so the answer must be 7.” This approach is more efficient and helps students develop number sense and problem-solving strategies.
So, the correct doubles plus one fact that results in a sum of 7 is 3 + 4, and it reinforces the relationship between numbers in a helpful and logical way
