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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 784 · 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. 1.28² =
  2. 2.29² =
  3. 3.11² =
  4. 4.17² =
  5. 5.18² =
  6. 6.27² =
  7. 7.26² =
  8. 8.21² =
  9. 9.22² =
  10. 10.13² =
  11. 11.15² =
  12. 12.19² =
  13. 13.12² =
  14. 14.23² =
  15. 15.24² =
  16. 16.14² =
  17. 17.25² =
  18. 18.16² =
  19. 19.21² =
  20. 20.13² =
  21. 21.14² =
  22. 22.21² =
  23. 23.12² =
  24. 24.28² =
  25. 25.21² =
  26. 26.11² =
  27. 27.16² =
  28. 28.13² =
  29. 29.21² =
  30. 30.13² =
  31. 31.14² =
  32. 32.16² =
  33. 33.22² =
  34. 34.24² =
  35. 35.21² =
  36. 36.12² =
  37. 37.21² =
  38. 38.21² =
  39. 39.22² =
  40. 40.17² =

Answer key

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

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