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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 207 · 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. 1.29² =
  2. 2.24² =
  3. 3.17² =
  4. 4.25² =
  5. 5.11² =
  6. 6.13² =
  7. 7.14² =
  8. 8.28² =
  9. 9.21² =
  10. 10.16² =
  11. 11.19² =
  12. 12.22² =
  13. 13.23² =
  14. 14.24² =
  15. 15.27² =
  16. 16.15² =
  17. 17.12² =
  18. 18.26² =
  19. 19.18² =
  20. 20.23² =
  21. 21.13² =
  22. 22.28² =
  23. 23.12² =
  24. 24.13² =
  25. 25.25² =
  26. 26.27² =
  27. 27.12² =
  28. 28.11² =
  29. 29.18² =
  30. 30.29² =
  31. 31.13² =
  32. 32.12² =
  33. 33.27² =
  34. 34.22² =
  35. 35.18² =
  36. 36.27² =
  37. 37.19² =
  38. 38.29² =
  39. 39.19² =
  40. 40.16² =

Answer key

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

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