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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 778 · 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. 1.23² =
  2. 2.17² =
  3. 3.19² =
  4. 4.22² =
  5. 5.18² =
  6. 6.13² =
  7. 7.12² =
  8. 8.11² =
  9. 9.25² =
  10. 10.14² =
  11. 11.27² =
  12. 12.15² =
  13. 13.29² =
  14. 14.28² =
  15. 15.24² =
  16. 16.26² =
  17. 17.19² =
  18. 18.21² =
  19. 19.28² =
  20. 20.18² =
  21. 21.17² =
  22. 22.25² =
  23. 23.27² =
  24. 24.16² =
  25. 25.27² =
  26. 26.13² =
  27. 27.29² =
  28. 28.24² =
  29. 29.28² =
  30. 30.21² =
  31. 31.23² =
  32. 32.13² =
  33. 33.21² =
  34. 34.23² =
  35. 35.29² =
  36. 36.22² =
  37. 37.22² =
  38. 38.13² =
  39. 39.13² =
  40. 40.23² =

Answer key

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

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