::Number facts strategies for addition/subtraction::

There are several number facts strategies that children use for addition and subtraction which are:-

1. Count on from larger:
1. 8 + 48 = 48, 49, 50, 51, 52, ..... 56
2. 11 + 54 = 54, 55, 56, 57, 58, 59, 60, .....65
2.  Doubles: 
1. 9 + 9= 18 
2. 12+12 = 24
3. Near doubles: 
1. 12 + 13 = (12 + 12 + 1) = 25
2.  24 + 25 = (24 + 24 + 1) = 49
4. Halving:
1. 26 - 13 = 13
2. 16 - 8 = 8
5. Near halving: 
1. 27 - 13 = 14 = (26 - 13 = 13 + 1= 14)
2. 17 - 8 = 9 = (16 - 8 = 8 + 1 = 9)
6. Bridging to 10, 100 or nearest decade or multiple of 10:
1. 59 + 21 = 60 + 20 = 80
2. 89 + 91 = 90 + 90 = 180