What is the primary difference between the Standard Algorithm Method for subtraction and the Austrian Algorithm Method for subtraction??
A. ?It is the same as the Standard Algorithm Method, except borrowing is done mentally.
B. ?It is different from the Standard Algorithm Method, because when a number is borrowed, it serves two purposes, as a number borrowed, and as a number that decreases the next column by one.
C. ?It is different from the Standard Algorithm Method, because when a number is borrowed, it serves two purposes, as a number borrowed in the smaller place-value, and as a number borrowed in the larger place-value.
D. ?Both are essentially the same method, except that striking outs are not shown.
E. ?Both involve borrowing, but the Austrian Algorithm Method often involves the stacking up of borrowed numbers when multiple borrowing occurs.
Answer: B
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