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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 258 · 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. 1.25² =
  2. 2.29² =
  3. 3.16² =
  4. 4.15² =
  5. 5.23² =
  6. 6.21² =
  7. 7.24² =
  8. 8.19² =
  9. 9.27² =
  10. 10.12² =
  11. 11.26² =
  12. 12.13² =
  13. 13.18² =
  14. 14.22² =
  15. 15.11² =
  16. 16.17² =
  17. 17.14² =
  18. 18.23² =
  19. 19.22² =
  20. 20.28² =
  21. 21.23² =
  22. 22.13² =
  23. 23.22² =
  24. 24.17² =
  25. 25.19² =
  26. 26.21² =
  27. 27.21² =
  28. 28.28² =
  29. 29.28² =
  30. 30.16² =
  31. 31.13² =
  32. 32.11² =
  33. 33.13² =
  34. 34.22² =
  35. 35.16² =
  36. 36.24² =
  37. 37.27² =
  38. 38.13² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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