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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 15 · 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. 1.12² =
  2. 2.27² =
  3. 3.26² =
  4. 4.21² =
  5. 5.13² =
  6. 6.25² =
  7. 7.16² =
  8. 8.23² =
  9. 9.28² =
  10. 10.29² =
  11. 11.18² =
  12. 12.17² =
  13. 13.11² =
  14. 14.22² =
  15. 15.15² =
  16. 16.19² =
  17. 17.24² =
  18. 18.14² =
  19. 19.26² =
  20. 20.16² =
  21. 21.25² =
  22. 22.13² =
  23. 23.15² =
  24. 24.16² =
  25. 25.21² =
  26. 26.21² =
  27. 27.17² =
  28. 28.15² =
  29. 29.27² =
  30. 30.13² =
  31. 31.17² =
  32. 32.29² =
  33. 33.13² =
  34. 34.11² =
  35. 35.23² =
  36. 36.28² =
  37. 37.26² =
  38. 38.22² =
  39. 39.23² =
  40. 40.14² =

Answer key

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

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