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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 559 · 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. 1.11² =
  2. 2.12² =
  3. 3.26² =
  4. 4.28² =
  5. 5.22² =
  6. 6.13² =
  7. 7.21² =
  8. 8.23² =
  9. 9.14² =
  10. 10.15² =
  11. 11.29² =
  12. 12.18² =
  13. 13.25² =
  14. 14.24² =
  15. 15.19² =
  16. 16.17² =
  17. 17.27² =
  18. 18.15² =
  19. 19.16² =
  20. 20.11² =
  21. 21.13² =
  22. 22.25² =
  23. 23.23² =
  24. 24.27² =
  25. 25.25² =
  26. 26.28² =
  27. 27.28² =
  28. 28.18² =
  29. 29.27² =
  30. 30.28² =
  31. 31.28² =
  32. 32.15² =
  33. 33.22² =
  34. 34.18² =
  35. 35.13² =
  36. 36.15² =
  37. 37.26² =
  38. 38.11² =
  39. 39.16² =
  40. 40.11² =

Answer key

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

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