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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 539 · 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. 1.14² =
  2. 2.13² =
  3. 3.29² =
  4. 4.11² =
  5. 5.21² =
  6. 6.16² =
  7. 7.24² =
  8. 8.25² =
  9. 9.12² =
  10. 10.27² =
  11. 11.23² =
  12. 12.26² =
  13. 13.17² =
  14. 14.18² =
  15. 15.22² =
  16. 16.19² =
  17. 17.15² =
  18. 18.14² =
  19. 19.28² =
  20. 20.17² =
  21. 21.24² =
  22. 22.15² =
  23. 23.21² =
  24. 24.12² =
  25. 25.26² =
  26. 26.19² =
  27. 27.27² =
  28. 28.18² =
  29. 29.28² =
  30. 30.24² =
  31. 31.25² =
  32. 32.28² =
  33. 33.24² =
  34. 34.17² =
  35. 35.21² =
  36. 36.27² =
  37. 37.15² =
  38. 38.28² =
  39. 39.19² =
  40. 40.17² =

Answer key

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

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