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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 724 · 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. 2.19² =
  3. 3.28² =
  4. 4.16² =
  5. 5.26² =
  6. 6.11² =
  7. 7.22² =
  8. 8.18² =
  9. 9.15² =
  10. 10.29² =
  11. 11.17² =
  12. 12.21² =
  13. 13.13² =
  14. 14.27² =
  15. 15.27² =
  16. 16.25² =
  17. 17.24² =
  18. 18.12² =
  19. 19.23² =
  20. 20.23² =
  21. 21.24² =
  22. 22.29² =
  23. 23.24² =
  24. 24.18² =
  25. 25.22² =
  26. 26.28² =
  27. 27.28² =
  28. 28.22² =
  29. 29.21² =
  30. 30.14² =
  31. 31.29² =
  32. 32.19² =
  33. 33.29² =
  34. 34.22² =
  35. 35.22² =
  36. 36.23² =
  37. 37.12² =
  38. 38.18² =
  39. 39.22² =
  40. 40.18² =

Answer key

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

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