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Specific Tricks

Level 15 / build-up

Near-1000 square

3 visual steps / near-base square

1. Left side

1007^21. Left sideCross-adjust once from the base.1left side 1007 + 7 =10142right side 7^2 = 0493answer 1014049
Cross-adjust once from the base.

Cross-adjust once from the base.

2. Right side

1007^22. Right sideMultiply offsets for padded digits.1left side 1007 + 7 =10142right side 7^2 = 0493answer 1014049
Multiply offsets for padded digits.

Multiply offsets for padded digits.

3. Read answer

1007^23. Read answerBorrow if the right side is negative. Read answer answer 1014049Borrow if the right side is negative.
Borrow if the right side is negative.

Borrow if the right side is negative.

Practice Level 15

Name the shape first; the shortcut stays small.

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