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Here are some things you need to know to help you child learn their addition fact quickly. Parts of an addition problem. 5+7=12 The numbers next to the addition symbol are called addends. The answer to an addition problem is called the sum. In the above example, 5 and 7 are addends and 12 is the sum. Turn-around Facts Facts that have the same addends in a different order. 5 + 7 = 12 and 7 + 5 = 12 are turn-around facts. The addition facts are grouped into several groups based on the types of addends they have and how they are solved. ZEROS DefinedTo solveExample- These are facts that have a zero as one of the addends. The sum is the other addend. 5+0=? One addend is zero, so the sum is the other addend, 5. 5+0=5 COUNTING ON DefinedTo solveExample- Exceptions- These facts are ones that have 1, 2, or 3 as one of the addends. Put the bigger addend in your fist, and COUNT ON using the fingers on the same hand. 6+3=? Make a fist and say “6”. Then count on by lifting fingers saying… “7, 8, 9”. 6 + 3 = 9. 9 + 1= 8+2= 7+3= The above and their turnaround facts are considered EQUALS TEN facts. 2+3= 3+4= The above and their turnaround facts are considered NEAR DOUBLES facts. DOUBLES DefinedTo solveExample- Facts where the addends are the same Memorize these answers. 5 + 5 = 10 NEAR DOUBLES DefinedTo solveExample- Exceptions- Facts where the addends are sequential numbers and their turn-around facts. Double the smaller number and add one. 6+5=? or 5+6=? 5 doubled (5+5) is 10. Add one… 11 6 + 5 = 11 0 + 1= 1 This fact and its turnaround fact are considered ZEROS facts 1+2=3 This fact is and its turn-around fact are considered COUNTING ON facts ADDING NINE DefinedTo solveExample- Facts that have a nine as an addend Make the “other” number one less and put a ten in front. (The “other” number is the addend that is not a nine) 6+9=? The other number is 6. Make it a 5. Put a ten in front of it. 15. 6 + 9 = 15. EQUALS TEN DefinedTo solveExampleExceptions Facts whose sums equal ten Memorize 8 + 2= 7+3= 6+4= 9 + 1= is considered a COUNTING ON fact. 5 + 5= is considered a DOUBLES fact TOUGHIES Defined- To solve- Example- These five facts and their turn-around facts. 4 + 7 = 11 5 + 7 = 12 4 + 8 = 12 5 + 8 = 13 6 + 8 = 14 Memorize, or use the same strategy as adding nine, only instead of making the “other” number one less, make it TWO less for the facts with 8 as an addend, or THREE less for the ones with 7. 5+8=? Think, to make a ten, add two to 8, take two from 5, and put the ten in front. Two less than 5 is 3, put a ten in front 13 5 + 8 = 13