If your child is fluent in addition and subtraction facts, feel free to start working on multiplication and division facts at home!

Strategies for Learning Addition Combinations

**Add Zero Facts**--like 6 + 0 and 0 + 4. Students learn the rule that when you add zero to any number, the number remains the same.

**Count On Facts**—3 + 4, 4 + 5, 5 + 6, 6 + 7, 7 + 8, 8 + 9, and 9 + 10. These are one or two more than the doubles. Students can use the doubles they know to learn these. “I know 5 + 5 is 10, so 5 + 6 is 1 more which is 11.”

**Doubles**—like 3 + 3 and 10 + 10. Students learn most of the doubles readily and can use the doubles they know to help with the harder doubles. “I know that 6 + 6 is 12, so 7 + 7 is 2 more, that’s 14.”

**Doubles Plus or Minus One**--like 4 + 3 and 5 + 6. Once students know their Doubles, this strategy is a breeze--it's just doubles and one more or one less.

**Make Ten Facts**—1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5, 6 + 4, 7 + 3, 8 + 2, and 9 + 1. Students need many experiences building all the ways there are to make 10 with manipulatives (tools they can hold) until they recognize these combinations.

**Add Ten Facts--**10 + 6 and 10 + 10. Because these combinations follow a structural pattern, students learn them readily once they have built them repeatedly with cubes or counted them out on the 100 chart.

**Add Nine Facts**– like 9 + 5 and 9 + 10. Students can think of these combinations this way: To solve 9 + 5, take one from the 5 and add it to the 9 to make 10. The 4 that are left are added to the 10; 10 + 4 = 14. Or, if we used 10 + 5 the answer would be 15, but because we added 1 extra when we take it away we get the answer 14.

Addition Fact Cards idea: Students work on addition combinations they are trying to learn better. They write a clue or strategy for each one. If the student does not have the combinations for 10 at recall there are games that can be requested that will help this

practice.

**Examples:**

4 + 3 =

3 + 4 =

*Clue: I know 3 + 3 = 6, so 4 + 3 is one more which is 7.*

5 + 3 =

3 + 5 =

*Clue: I know 5 + 5 = 10. Three is 2 less than 5 so 10 – 2 = 8*

6 + 3 =

3 + 6 =

*Clue: I know 6 + 4 = 10. Three is one less than 4 so, 6 + 3 =9*

8 + 3 =

3 + 8 =

*Clue: I know that 8 needs 2 more to make 10 so I make the 3 into a 1, 10 + 1 = 11*

7 + 3 =

3 + 7 =

*Clue: I know my 10 combinations*

9 + 3 =

3 + 9 =

*Clue: I take one from the 3 and make 9 into a 10. 10 + 2 = 12*

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