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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 730 · 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. 2.26² =
  3. 3.27² =
  4. 4.12² =
  5. 5.28² =
  6. 6.21² =
  7. 7.18² =
  8. 8.25² =
  9. 9.13² =
  10. 10.29² =
  11. 11.14² =
  12. 12.15² =
  13. 13.24² =
  14. 14.19² =
  15. 15.17² =
  16. 16.22² =
  17. 17.24² =
  18. 18.16² =
  19. 19.23² =
  20. 20.11² =
  21. 21.23² =
  22. 22.12² =
  23. 23.25² =
  24. 24.15² =
  25. 25.23² =
  26. 26.27² =
  27. 27.16² =
  28. 28.21² =
  29. 29.13² =
  30. 30.25² =
  31. 31.23² =
  32. 32.19² =
  33. 33.19² =
  34. 34.16² =
  35. 35.11² =
  36. 36.23² =
  37. 37.15² =
  38. 38.12² =
  39. 39.28² =
  40. 40.13² =

Answer key

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

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