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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 822 · 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. 1.29² =
  2. 2.24² =
  3. 3.14² =
  4. 4.19² =
  5. 5.17² =
  6. 6.12² =
  7. 7.22² =
  8. 8.16² =
  9. 9.27² =
  10. 10.21² =
  11. 11.15² =
  12. 12.28² =
  13. 13.18² =
  14. 14.23² =
  15. 15.26² =
  16. 16.13² =
  17. 17.13² =
  18. 18.25² =
  19. 19.11² =
  20. 20.21² =
  21. 21.15² =
  22. 22.27² =
  23. 23.18² =
  24. 24.21² =
  25. 25.13² =
  26. 26.28² =
  27. 27.21² =
  28. 28.15² =
  29. 29.22² =
  30. 30.28² =
  31. 31.22² =
  32. 32.27² =
  33. 33.14² =
  34. 34.18² =
  35. 35.14² =
  36. 36.24² =
  37. 37.21² =
  38. 38.27² =
  39. 39.27² =
  40. 40.19² =

Answer key

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

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