A number of methods are adapted to hand calculation; for example, when making change, no actual subtraction is performed, but rather the change-maker counts forward.
For example, when making change, no actual subtraction is performed, but rather the change-maker counts forward. A number of methods are adapted to hand calculation.
A number of methods are adapted to hand calculation. For example, when making change, no actual subtraction is performed, but rather the change-maker counts forward.
A number of methods are adapted to hand calculation. For example, when making change, no actual subtraction is performed, but rather the change-maker counts forward.