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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 442 · 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. 2.14² =
  3. 3.13² =
  4. 4.18² =
  5. 5.19² =
  6. 6.27² =
  7. 7.25² =
  8. 8.16² =
  9. 9.22² =
  10. 10.15² =
  11. 11.28² =
  12. 12.17² =
  13. 13.21² =
  14. 14.12² =
  15. 15.29² =
  16. 16.26² =
  17. 17.29² =
  18. 18.24² =
  19. 19.11² =
  20. 20.29² =
  21. 21.12² =
  22. 22.21² =
  23. 23.17² =
  24. 24.17² =
  25. 25.23² =
  26. 26.17² =
  27. 27.24² =
  28. 28.15² =
  29. 29.12² =
  30. 30.26² =
  31. 31.14² =
  32. 32.25² =
  33. 33.11² =
  34. 34.29² =
  35. 35.13² =
  36. 36.27² =
  37. 37.22² =
  38. 38.18² =
  39. 39.13² =
  40. 40.17² =

Answer key

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

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