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computation - subtraction Pamela Leutwyler
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base ten example The same algorithm will be used in other bases
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hundreds tens ones 1 3 4 - 7 8
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hundreds tens ones 1 3 4 - 7 8
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hundreds tens ones 1 3 4 - 7 8
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hundreds tens ones 1 3 4 - 7 8 remove 8 pebbles
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hundreds tens ones 1 3 4 - 7 8 remove 8 pebbles borrow
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hundreds tens ones 1 2 3 4 - 7 8 1 remove 8 pebbles borrow
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hundreds tens ones 1 2 3 4 - 7 8 1 remove 8 pebbles
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hundreds tens ones 1 2 3 4 - 7 8 6 1
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hundreds tens ones 1 2 3 4 - 7 8 6 1
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hundreds tens ones 1 2 3 4 - 7 8 6 1 remove 7
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hundreds tens ones 1 2 3 4 - 7 8 6 1 remove 7 borrow
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hundreds tens ones 1 2 3 4 - 7 8 6 1 remove 7 borrow
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hundreds tens ones 1 2 3 4 - 7 8 6 1 1 remove 7 borrow
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hundreds tens ones 1 2 3 4 - 7 8 6 1 1 remove 7
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hundreds tens ones 1 2 3 4 - 7 8 6 1 1 remove 7
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hundreds tens ones 1 2 3 4 - 7 8 5 6 1 1
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hundreds tens ones 1 2 3 4 - 7 8 5 6 1 1
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base five example
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twenty fives fives ones 1 3 15 - 4 35
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twenty fives fives ones 1 3 15 - 4 35
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twenty fives fives ones 1 3 15 - 4 35
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twenty fives fives ones 1 3 15 - 4 35 remove 3 pebbles
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twenty fives fives ones 1 3 15 - 4 35 remove 3 pebbles borrow
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1 2 3 15 - 4 35 1 remove 3 pebbles twenty fives fives ones base 5
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1 2 3 15 - 4 35 11 6 Think in base 10 6 1 remove 3 pebbles
twenty fives fives ones 1 2 3 15 - 4 35 base base 10 11 6 6 1 remove 3 pebbles
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twenty fives fives ones 1 2 3 15 - 4 35 6 1 remove 3 pebbles
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twenty fives fives ones 1 2 3 15 - 4 35 6 1
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twenty fives fives ones 1 2 3 15 - 4 35 6 1 remove 4
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twenty fives fives ones 1 2 3 15 - 4 35 6 1 remove 4 borrow
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twenty fives fives ones 1 2 3 15 - 4 35 6 1 remove 4 borrow
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twenty fives fives ones 1 2 3 15 - 4 35 1 6 1 remove 4 borrow
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1 2 3 15 - 4 35 11 6 12 7 7 1 6 1 remove 4 twenty fives fives ones
base base 10 11 6 12 7 7 1 6 1 remove 4
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1 2 3 15 - 4 35 11 6 12 7 7 1 6 1 remove 4 twenty fives fives ones
base base 10 11 6 12 7 7 1 6 1 remove 4
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1 2 3 15 - 4 35 11 6 12 7 7 1 6 1 remove 4 twenty fives fives ones
base base 10 11 6 12 7 7 1 6 1 remove 4
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1 2 3 15 - 4 35 11 6 12 7 7 1 6 1 twenty fives fives ones base 5
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1 2 3 15 - 4 35 11 6 12 7 7 1 6 1 twenty fives fives ones base 5
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