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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 603 · 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. 1.22² =
  2. 2.29² =
  3. 3.11² =
  4. 4.14² =
  5. 5.15² =
  6. 6.12² =
  7. 7.21² =
  8. 8.28² =
  9. 9.25² =
  10. 10.18² =
  11. 11.17² =
  12. 12.16² =
  13. 13.23² =
  14. 14.19² =
  15. 15.13² =
  16. 16.24² =
  17. 17.26² =
  18. 18.27² =
  19. 19.23² =
  20. 20.19² =
  21. 21.23² =
  22. 22.25² =
  23. 23.28² =
  24. 24.15² =
  25. 25.18² =
  26. 26.19² =
  27. 27.14² =
  28. 28.28² =
  29. 29.26² =
  30. 30.22² =
  31. 31.11² =
  32. 32.18² =
  33. 33.28² =
  34. 34.27² =
  35. 35.11² =
  36. 36.23² =
  37. 37.19² =
  38. 38.15² =
  39. 39.18² =
  40. 40.15² =

Answer key

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

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