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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 9 · 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. 1.13² =
  2. 2.17² =
  3. 3.21² =
  4. 4.15² =
  5. 5.18² =
  6. 6.26² =
  7. 7.25² =
  8. 8.19² =
  9. 9.24² =
  10. 10.16² =
  11. 11.23² =
  12. 12.28² =
  13. 13.12² =
  14. 14.14² =
  15. 15.11² =
  16. 16.27² =
  17. 17.22² =
  18. 18.29² =
  19. 19.17² =
  20. 20.18² =
  21. 21.25² =
  22. 22.11² =
  23. 23.26² =
  24. 24.11² =
  25. 25.11² =
  26. 26.11² =
  27. 27.18² =
  28. 28.11² =
  29. 29.17² =
  30. 30.29² =
  31. 31.22² =
  32. 32.22² =
  33. 33.25² =
  34. 34.22² =
  35. 35.29² =
  36. 36.21² =
  37. 37.11² =
  38. 38.21² =
  39. 39.14² =
  40. 40.14² =

Answer key

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

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