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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 444 · 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. 1.22² =
  2. 2.26² =
  3. 3.19² =
  4. 4.21² =
  5. 5.12² =
  6. 6.14² =
  7. 7.27² =
  8. 8.15² =
  9. 9.17² =
  10. 10.28² =
  11. 11.24² =
  12. 12.25² =
  13. 13.23² =
  14. 14.16² =
  15. 15.29² =
  16. 16.13² =
  17. 17.11² =
  18. 18.18² =
  19. 19.26² =
  20. 20.23² =
  21. 21.27² =
  22. 22.11² =
  23. 23.21² =
  24. 24.15² =
  25. 25.21² =
  26. 26.27² =
  27. 27.13² =
  28. 28.27² =
  29. 29.13² =
  30. 30.21² =
  31. 31.13² =
  32. 32.24² =
  33. 33.12² =
  34. 34.29² =
  35. 35.18² =
  36. 36.21² =
  37. 37.21² =
  38. 38.19² =
  39. 39.21² =
  40. 40.14² =

Answer key

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

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