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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 102 · 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. 1.17² =
  2. 2.23² =
  3. 3.28² =
  4. 4.15² =
  5. 5.26² =
  6. 6.12² =
  7. 7.22² =
  8. 8.13² =
  9. 9.21² =
  10. 10.24² =
  11. 11.25² =
  12. 12.11² =
  13. 13.16² =
  14. 14.29² =
  15. 15.19² =
  16. 16.14² =
  17. 17.27² =
  18. 18.16² =
  19. 19.27² =
  20. 20.18² =
  21. 21.11² =
  22. 22.16² =
  23. 23.11² =
  24. 24.13² =
  25. 25.26² =
  26. 26.21² =
  27. 27.22² =
  28. 28.29² =
  29. 29.15² =
  30. 30.16² =
  31. 31.21² =
  32. 32.13² =
  33. 33.25² =
  34. 34.12² =
  35. 35.29² =
  36. 36.17² =
  37. 37.19² =
  38. 38.16² =
  39. 39.13² =
  40. 40.12² =

Answer key

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

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