Subtraction - Mental Calculation Methods
Partitioning - bridging method
Partitioning - Into component parts
Special Case Strategies
|Calculating a small difference. E.g. 37-35 (compare multi-link towers/look at position of numbers on a number line.|
Compensation - rounding and adjusting
Subtraction vocabulary includes; total, take, take away, leave, How many are left? How many have gone? Less, fewer, difference between.