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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 131 · 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. 1.24² =
  2. 2.28² =
  3. 3.25² =
  4. 4.27² =
  5. 5.29² =
  6. 6.16² =
  7. 7.11² =
  8. 8.15² =
  9. 9.14² =
  10. 10.23² =
  11. 11.21² =
  12. 12.12² =
  13. 13.13² =
  14. 14.19² =
  15. 15.26² =
  16. 16.18² =
  17. 17.22² =
  18. 18.19² =
  19. 19.28² =
  20. 20.17² =
  21. 21.13² =
  22. 22.25² =
  23. 23.11² =
  24. 24.29² =
  25. 25.11² =
  26. 26.13² =
  27. 27.25² =
  28. 28.21² =
  29. 29.22² =
  30. 30.12² =
  31. 31.26² =
  32. 32.16² =
  33. 33.14² =
  34. 34.19² =
  35. 35.22² =
  36. 36.21² =
  37. 37.13² =
  38. 38.15² =
  39. 39.17² =
  40. 40.22² =

Answer key

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

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