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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 652 · 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. 2.15² =
  3. 3.24² =
  4. 4.14² =
  5. 5.25² =
  6. 6.27² =
  7. 7.11² =
  8. 8.21² =
  9. 9.29² =
  10. 10.22² =
  11. 11.18² =
  12. 12.13² =
  13. 13.19² =
  14. 14.17² =
  15. 15.25² =
  16. 16.28² =
  17. 17.23² =
  18. 18.16² =
  19. 19.24² =
  20. 20.11² =
  21. 21.17² =
  22. 22.15² =
  23. 23.26² =
  24. 24.28² =
  25. 25.12² =
  26. 26.21² =
  27. 27.12² =
  28. 28.16² =
  29. 29.24² =
  30. 30.28² =
  31. 31.22² =
  32. 32.23² =
  33. 33.29² =
  34. 34.13² =
  35. 35.22² =
  36. 36.17² =
  37. 37.24² =
  38. 38.25² =
  39. 39.21² =
  40. 40.19² =

Answer key

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

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