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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 788 · 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. 1.16² =
  2. 2.18² =
  3. 3.13² =
  4. 4.26² =
  5. 5.14² =
  6. 6.12² =
  7. 7.22² =
  8. 8.11² =
  9. 9.24² =
  10. 10.17² =
  11. 11.29² =
  12. 12.21² =
  13. 13.23² =
  14. 14.27² =
  15. 15.28² =
  16. 16.25² =
  17. 17.15² =
  18. 18.14² =
  19. 19.19² =
  20. 20.18² =
  21. 21.28² =
  22. 22.12² =
  23. 23.27² =
  24. 24.28² =
  25. 25.14² =
  26. 26.13² =
  27. 27.27² =
  28. 28.21² =
  29. 29.11² =
  30. 30.22² =
  31. 31.18² =
  32. 32.19² =
  33. 33.26² =
  34. 34.26² =
  35. 35.21² =
  36. 36.25² =
  37. 37.29² =
  38. 38.25² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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