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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 429 · 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. 2.26² =
  3. 3.15² =
  4. 4.12² =
  5. 5.21² =
  6. 6.24² =
  7. 7.11² =
  8. 8.28² =
  9. 9.23² =
  10. 10.18² =
  11. 11.27² =
  12. 12.13² =
  13. 13.29² =
  14. 14.17² =
  15. 15.23² =
  16. 16.25² =
  17. 17.12² =
  18. 18.16² =
  19. 19.14² =
  20. 20.19² =
  21. 21.24² =
  22. 22.12² =
  23. 23.26² =
  24. 24.28² =
  25. 25.18² =
  26. 26.29² =
  27. 27.13² =
  28. 28.22² =
  29. 29.18² =
  30. 30.11² =
  31. 31.29² =
  32. 32.14² =
  33. 33.23² =
  34. 34.27² =
  35. 35.21² =
  36. 36.27² =
  37. 37.26² =
  38. 38.27² =
  39. 39.19² =
  40. 40.26² =

Answer key

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

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