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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 454 · 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. 2.27² =
  3. 3.28² =
  4. 4.25² =
  5. 5.19² =
  6. 6.23² =
  7. 7.13² =
  8. 8.14² =
  9. 9.21² =
  10. 10.29² =
  11. 11.24² =
  12. 12.18² =
  13. 13.15² =
  14. 14.12² =
  15. 15.16² =
  16. 16.17² =
  17. 17.11² =
  18. 18.17² =
  19. 19.26² =
  20. 20.27² =
  21. 21.11² =
  22. 22.24² =
  23. 23.26² =
  24. 24.23² =
  25. 25.19² =
  26. 26.29² =
  27. 27.21² =
  28. 28.26² =
  29. 29.27² =
  30. 30.25² =
  31. 31.13² =
  32. 32.11² =
  33. 33.11² =
  34. 34.16² =
  35. 35.16² =
  36. 36.11² =
  37. 37.24² =
  38. 38.17² =
  39. 39.11² =
  40. 40.19² =

Answer key

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

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