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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 292 · 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. 2.21² =
  3. 3.15² =
  4. 4.29² =
  5. 5.18² =
  6. 6.11² =
  7. 7.26² =
  8. 8.24² =
  9. 9.22² =
  10. 10.25² =
  11. 11.17² =
  12. 12.27² =
  13. 13.28² =
  14. 14.16² =
  15. 15.14² =
  16. 16.12² =
  17. 17.12² =
  18. 18.19² =
  19. 19.23² =
  20. 20.28² =
  21. 21.12² =
  22. 22.21² =
  23. 23.22² =
  24. 24.18² =
  25. 25.18² =
  26. 26.24² =
  27. 27.12² =
  28. 28.14² =
  29. 29.21² =
  30. 30.12² =
  31. 31.22² =
  32. 32.12² =
  33. 33.21² =
  34. 34.11² =
  35. 35.27² =
  36. 36.17² =
  37. 37.23² =
  38. 38.29² =
  39. 39.28² =
  40. 40.12² =

Answer key

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

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