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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 96 · 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. 2.11² =
  3. 3.22² =
  4. 4.17² =
  5. 5.29² =
  6. 6.23² =
  7. 7.12² =
  8. 8.16² =
  9. 9.21² =
  10. 10.27² =
  11. 11.18² =
  12. 12.15² =
  13. 13.26² =
  14. 14.14² =
  15. 15.25² =
  16. 16.28² =
  17. 17.11² =
  18. 18.19² =
  19. 19.29² =
  20. 20.25² =
  21. 21.17² =
  22. 22.11² =
  23. 23.29² =
  24. 24.24² =
  25. 25.24² =
  26. 26.21² =
  27. 27.22² =
  28. 28.13² =
  29. 29.24² =
  30. 30.14² =
  31. 31.11² =
  32. 32.12² =
  33. 33.21² =
  34. 34.12² =
  35. 35.25² =
  36. 36.12² =
  37. 37.29² =
  38. 38.11² =
  39. 39.18² =
  40. 40.12² =

Answer key

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

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