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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 260 · 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. 1.11² =
  2. 2.28² =
  3. 3.23² =
  4. 4.16² =
  5. 5.21² =
  6. 6.17² =
  7. 7.15² =
  8. 8.26² =
  9. 9.12² =
  10. 10.24² =
  11. 11.29² =
  12. 12.19² =
  13. 13.13² =
  14. 14.27² =
  15. 15.25² =
  16. 16.14² =
  17. 17.18² =
  18. 18.25² =
  19. 19.22² =
  20. 20.26² =
  21. 21.14² =
  22. 22.11² =
  23. 23.17² =
  24. 24.24² =
  25. 25.17² =
  26. 26.21² =
  27. 27.28² =
  28. 28.24² =
  29. 29.13² =
  30. 30.27² =
  31. 31.16² =
  32. 32.19² =
  33. 33.26² =
  34. 34.27² =
  35. 35.25² =
  36. 36.18² =
  37. 37.17² =
  38. 38.21² =
  39. 39.16² =
  40. 40.14² =

Answer key

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

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