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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 319 · 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. 1.26² =
  2. 2.21² =
  3. 3.11² =
  4. 4.27² =
  5. 5.14² =
  6. 6.12² =
  7. 7.15² =
  8. 8.19² =
  9. 9.17² =
  10. 10.23² =
  11. 11.25² =
  12. 12.13² =
  13. 13.28² =
  14. 14.22² =
  15. 15.16² =
  16. 16.18² =
  17. 17.24² =
  18. 18.29² =
  19. 19.26² =
  20. 20.26² =
  21. 21.22² =
  22. 22.22² =
  23. 23.27² =
  24. 24.21² =
  25. 25.16² =
  26. 26.13² =
  27. 27.21² =
  28. 28.24² =
  29. 29.17² =
  30. 30.16² =
  31. 31.28² =
  32. 32.21² =
  33. 33.18² =
  34. 34.18² =
  35. 35.23² =
  36. 36.15² =
  37. 37.19² =
  38. 38.11² =
  39. 39.26² =
  40. 40.17² =

Answer key

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

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