Addition FactsAddition facts are all the addition combinations of 1digit numbers (including 0) Facts With Sums of 10 or Less Here are a few short methods to help memorize facts with sums of ten or less. Method 1: If the second addend in an addition problem is greater than the first, the problem can be made easier by switching the addends using the commutative property. This way it is simpler to count up from the first number to get the sum. Correct
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Practice 2:
Method 2: If you have two addends that are near doubles, or numbers with a difference of 1 (for example 3 and 4), then it is easy to double the lower number and add one to it. Method 3: Sometimes, it is a good idea to split one addend into smaller numbers that add up to that addend, and then add them, one at a time, to the first number. Example: 5 + 4 Practice this method with the problem 6 + 3 Correct
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Practice 2:
Correct
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Solve Mentally (using any method) Facts with Sums Greater than 10 Method 1: If the second addend in an addition problem is greater than the first, the problem can be made easier by switching the addends using the commutative property. This is very much like the first method for adding with sums of ten or less. Practice these problems using Method 1; Correct
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Practice 2:
Method 2: If you have two addends that are near doubles, or numbers with a difference of 1 (for example 7 and 8), then it is easy to double the lower number and add one to it. This is like method 2 of addition with sums of ten or less. Practice these problems using Method 2; Correct
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Practice 2:
Method 3: Split the smaller addend into two parts so that the first part adds up with the biggest addend to make ten. Then add on the second part. Practice this method using these problems;
Practice 2:
Solve Mentally (using any method):
Addition Table*
*0 is not included because any number plus 0 is itself.

