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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 591 · 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. 2.26² =
  3. 3.12² =
  4. 4.19² =
  5. 5.16² =
  6. 6.18² =
  7. 7.28² =
  8. 8.29² =
  9. 9.21² =
  10. 10.22² =
  11. 11.24² =
  12. 12.25² =
  13. 13.15² =
  14. 14.23² =
  15. 15.11² =
  16. 16.13² =
  17. 17.27² =
  18. 18.17² =
  19. 19.29² =
  20. 20.11² =
  21. 21.29² =
  22. 22.21² =
  23. 23.11² =
  24. 24.24² =
  25. 25.15² =
  26. 26.28² =
  27. 27.24² =
  28. 28.11² =
  29. 29.24² =
  30. 30.29² =
  31. 31.23² =
  32. 32.17² =
  33. 33.13² =
  34. 34.29² =
  35. 35.17² =
  36. 36.13² =
  37. 37.25² =
  38. 38.24² =
  39. 39.15² =
  40. 40.26² =

Answer key

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

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