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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 253 · 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. 1.13² =
  2. 2.24² =
  3. 3.29² =
  4. 4.14² =
  5. 5.21² =
  6. 6.23² =
  7. 7.19² =
  8. 8.12² =
  9. 9.25² =
  10. 10.11² =
  11. 11.26² =
  12. 12.17² =
  13. 13.16² =
  14. 14.15² =
  15. 15.27² =
  16. 16.28² =
  17. 17.21² =
  18. 18.18² =
  19. 19.22² =
  20. 20.21² =
  21. 21.12² =
  22. 22.25² =
  23. 23.16² =
  24. 24.11² =
  25. 25.24² =
  26. 26.21² =
  27. 27.14² =
  28. 28.16² =
  29. 29.15² =
  30. 30.14² =
  31. 31.16² =
  32. 32.12² =
  33. 33.27² =
  34. 34.11² =
  35. 35.24² =
  36. 36.21² =
  37. 37.15² =
  38. 38.27² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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