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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 113 · 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. 1.21² =
  2. 2.16² =
  3. 3.29² =
  4. 4.22² =
  5. 5.12² =
  6. 6.11² =
  7. 7.13² =
  8. 8.23² =
  9. 9.19² =
  10. 10.15² =
  11. 11.14² =
  12. 12.28² =
  13. 13.27² =
  14. 14.24² =
  15. 15.26² =
  16. 16.25² =
  17. 17.16² =
  18. 18.17² =
  19. 19.18² =
  20. 20.25² =
  21. 21.14² =
  22. 22.23² =
  23. 23.18² =
  24. 24.27² =
  25. 25.19² =
  26. 26.12² =
  27. 27.28² =
  28. 28.12² =
  29. 29.21² =
  30. 30.17² =
  31. 31.24² =
  32. 32.27² =
  33. 33.18² =
  34. 34.25² =
  35. 35.11² =
  36. 36.27² =
  37. 37.27² =
  38. 38.13² =
  39. 39.25² =
  40. 40.29² =

Answer key

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

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