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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 686 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.17² =
  2. 2.21² =
  3. 3.24² =
  4. 4.11² =
  5. 5.13² =
  6. 6.26² =
  7. 7.25² =
  8. 8.14² =
  9. 9.22² =
  10. 10.12² =
  11. 11.29² =
  12. 12.18² =
  13. 13.27² =
  14. 14.28² =
  15. 15.23² =
  16. 16.19² =
  17. 17.15² =
  18. 18.16² =
  19. 19.17² =
  20. 20.24² =
  21. 21.23² =
  22. 22.13² =
  23. 23.12² =
  24. 24.24² =
  25. 25.22² =
  26. 26.13² =
  27. 27.15² =
  28. 28.23² =
  29. 29.21² =
  30. 30.18² =
  31. 31.24² =
  32. 32.21² =
  33. 33.18² =
  34. 34.16² =
  35. 35.13² =
  36. 36.22² =
  37. 37.16² =
  38. 38.23² =
  39. 39.14² =
  40. 40.16² =

Answer key

  1. 289
  2. 441
  3. 576
  4. 121
  5. 169
  6. 676
  7. 625
  8. 196
  9. 484
  10. 144
  11. 841
  12. 324
  13. 729
  14. 784
  15. 529
  16. 361
  17. 225
  18. 256
  19. 289
  20. 576
  21. 529
  22. 169
  23. 144
  24. 576
  25. 484
  26. 169
  27. 225
  28. 529
  29. 441
  30. 324
  31. 576
  32. 441
  33. 324
  34. 256
  35. 169
  36. 484
  37. 256
  38. 529
  39. 196
  40. 256

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