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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 146 · 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. 2.18² =
  3. 3.22² =
  4. 4.19² =
  5. 5.16² =
  6. 6.27² =
  7. 7.15² =
  8. 8.14² =
  9. 9.24² =
  10. 10.21² =
  11. 11.23² =
  12. 12.13² =
  13. 13.29² =
  14. 14.12² =
  15. 15.25² =
  16. 16.11² =
  17. 17.28² =
  18. 18.21² =
  19. 19.23² =
  20. 20.17² =
  21. 21.23² =
  22. 22.11² =
  23. 23.21² =
  24. 24.13² =
  25. 25.23² =
  26. 26.21² =
  27. 27.22² =
  28. 28.19² =
  29. 29.28² =
  30. 30.13² =
  31. 31.25² =
  32. 32.27² =
  33. 33.18² =
  34. 34.22² =
  35. 35.19² =
  36. 36.21² =
  37. 37.23² =
  38. 38.17² =
  39. 39.22² =
  40. 40.14² =

Answer key

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

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