Addition Strategies
1. Plus Zero - Add 0 to a number and the number stays the same. (3+0 = 0)
2. Count Up +1, +2, +3 - Count up when adding on small numbers such as 1, 2, or 3.
3. Turn Around - Add any numbers in any order and the total stays the same. (4+1=5 or 1+4=5)
4. Doubles - Add the number to itself and that number doubles. (2+2=4)
5. Doubles Plus One - Double the number and add one more. (2+3 = 2+2+1)
6. Tens Partners - There are six sets of number pairs that make 10: (10+0, 9+1, 8+2, 7+3, 6+4, 5+5)
7. Plus Ten - When 10 is added to a number, the tens-place digit increases by one. (32+10=42)
8. Plus Nine -
See 9. Think 10 - To add 9 to a number, add 10 instead and jump back one.
(See 6+9. Think 6+10-1)
or
See 9. Think 10 - To add 9 to a number, make the 9 a 10 by reducing the other addend by one.
(See 9+4. Make 10+3)
