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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 461 · 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. 1.21² =
  2. 2.26² =
  3. 3.24² =
  4. 4.23² =
  5. 5.27² =
  6. 6.16² =
  7. 7.13² =
  8. 8.14² =
  9. 9.29² =
  10. 10.11² =
  11. 11.17² =
  12. 12.28² =
  13. 13.12² =
  14. 14.15² =
  15. 15.19² =
  16. 16.24² =
  17. 17.22² =
  18. 18.22² =
  19. 19.25² =
  20. 20.18² =
  21. 21.16² =
  22. 22.11² =
  23. 23.21² =
  24. 24.17² =
  25. 25.12² =
  26. 26.19² =
  27. 27.11² =
  28. 28.22² =
  29. 29.11² =
  30. 30.25² =
  31. 31.19² =
  32. 32.16² =
  33. 33.17² =
  34. 34.14² =
  35. 35.17² =
  36. 36.15² =
  37. 37.27² =
  38. 38.13² =
  39. 39.26² =
  40. 40.21² =

Answer key

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

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