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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 174 · 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. 2.23² =
  3. 3.17² =
  4. 4.28² =
  5. 5.27² =
  6. 6.11² =
  7. 7.21² =
  8. 8.13² =
  9. 9.26² =
  10. 10.25² =
  11. 11.16² =
  12. 12.29² =
  13. 13.22² =
  14. 14.14² =
  15. 15.18² =
  16. 16.19² =
  17. 17.24² =
  18. 18.15² =
  19. 19.21² =
  20. 20.22² =
  21. 21.29² =
  22. 22.22² =
  23. 23.27² =
  24. 24.15² =
  25. 25.29² =
  26. 26.29² =
  27. 27.26² =
  28. 28.12² =
  29. 29.21² =
  30. 30.21² =
  31. 31.18² =
  32. 32.26² =
  33. 33.11² =
  34. 34.13² =
  35. 35.29² =
  36. 36.28² =
  37. 37.29² =
  38. 38.25² =
  39. 39.18² =
  40. 40.21² =

Answer key

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

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