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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 842 · 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. 1.29² =
  2. 2.12² =
  3. 3.15² =
  4. 4.26² =
  5. 5.11² =
  6. 6.17² =
  7. 7.13² =
  8. 8.21² =
  9. 9.22² =
  10. 10.16² =
  11. 11.24² =
  12. 12.28² =
  13. 13.27² =
  14. 14.19² =
  15. 15.23² =
  16. 16.25² =
  17. 17.14² =
  18. 18.27² =
  19. 19.28² =
  20. 20.19² =
  21. 21.23² =
  22. 22.18² =
  23. 23.17² =
  24. 24.25² =
  25. 25.24² =
  26. 26.21² =
  27. 27.23² =
  28. 28.21² =
  29. 29.29² =
  30. 30.16² =
  31. 31.11² =
  32. 32.17² =
  33. 33.16² =
  34. 34.16² =
  35. 35.12² =
  36. 36.28² =
  37. 37.28² =
  38. 38.28² =
  39. 39.24² =
  40. 40.18² =

Answer key

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

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