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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 343 · 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. 1.23² =
  2. 2.22² =
  3. 3.28² =
  4. 4.11² =
  5. 5.15² =
  6. 6.27² =
  7. 7.19² =
  8. 8.29² =
  9. 9.21² =
  10. 10.25² =
  11. 11.17² =
  12. 12.16² =
  13. 13.12² =
  14. 14.24² =
  15. 15.18² =
  16. 16.14² =
  17. 17.13² =
  18. 18.26² =
  19. 19.11² =
  20. 20.25² =
  21. 21.23² =
  22. 22.13² =
  23. 23.25² =
  24. 24.13² =
  25. 25.21² =
  26. 26.21² =
  27. 27.25² =
  28. 28.11² =
  29. 29.11² =
  30. 30.16² =
  31. 31.21² =
  32. 32.27² =
  33. 33.22² =
  34. 34.21² =
  35. 35.28² =
  36. 36.28² =
  37. 37.22² =
  38. 38.22² =
  39. 39.25² =
  40. 40.19² =

Answer key

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

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