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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 125 · 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. 1.21² =
  2. 2.19² =
  3. 3.27² =
  4. 4.23² =
  5. 5.13² =
  6. 6.14² =
  7. 7.17² =
  8. 8.24² =
  9. 9.26² =
  10. 10.25² =
  11. 11.22² =
  12. 12.16² =
  13. 13.12² =
  14. 14.28² =
  15. 15.11² =
  16. 16.29² =
  17. 17.15² =
  18. 18.13² =
  19. 19.18² =
  20. 20.21² =
  21. 21.18² =
  22. 22.26² =
  23. 23.17² =
  24. 24.25² =
  25. 25.16² =
  26. 26.13² =
  27. 27.16² =
  28. 28.13² =
  29. 29.23² =
  30. 30.16² =
  31. 31.22² =
  32. 32.13² =
  33. 33.18² =
  34. 34.14² =
  35. 35.16² =
  36. 36.23² =
  37. 37.27² =
  38. 38.16² =
  39. 39.25² =
  40. 40.21² =

Answer key

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

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