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Squares

Level 21 / mastery

4d square D1:1-2 (small)

5 visual steps / 4-digit square split

1. Split thousands

1021^21. Split thousands split into base and tail 1021=1000+21base square1000^21000000double product_tail square_
1021 as 1000 + 21.

1021 as 1000 + 21.

2. Double product

1021^22. Double product split into base and tail 1021=1000+21base square1000^21000000double product2 x 1000 x 2142000tail square_
2 x 1000 x 21 = 42000.

2 x 1000 x 21 = 42000.

3. Tail square

1021^23. Tail square split into base and tail 1021=1000+21base square1000^21000000double product2 x 1000 x 2142000tail square21^2441
21^2 = 441.

21^2 = 441.

4. Combine parts

1021^24. Combine parts split into base and tail 1021=1000+21base square1000^21000000double product2 x 1000 x 2142000tail square21^24411000000 + 42000 + 441 = 1042441
1000000 + 42000 + 441 = 1042441.

1000000 + 42000 + 441 = 1042441.

5. Read answer

1021^25. Read answer Read answer 1021^2 = 1042441Read 1021^2 = 1042441.
Read 1021^2 = 1042441.

Read 1021^2 = 1042441.

Practice Level 21

Use the visible move, then type only when the answer is clear.

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