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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 814 · 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. 1.14² =
  2. 2.22² =
  3. 3.16² =
  4. 4.29² =
  5. 5.19² =
  6. 6.17² =
  7. 7.13² =
  8. 8.15² =
  9. 9.12² =
  10. 10.23² =
  11. 11.11² =
  12. 12.28² =
  13. 13.21² =
  14. 14.26² =
  15. 15.25² =
  16. 16.24² =
  17. 17.27² =
  18. 18.12² =
  19. 19.18² =
  20. 20.18² =
  21. 21.19² =
  22. 22.27² =
  23. 23.21² =
  24. 24.25² =
  25. 25.18² =
  26. 26.13² =
  27. 27.23² =
  28. 28.23² =
  29. 29.28² =
  30. 30.17² =
  31. 31.27² =
  32. 32.13² =
  33. 33.28² =
  34. 34.21² =
  35. 35.17² =
  36. 36.29² =
  37. 37.22² =
  38. 38.21² =
  39. 39.16² =
  40. 40.16² =

Answer key

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

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