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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 112 · 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. 3.25² =
  4. 4.29² =
  5. 5.17² =
  6. 6.28² =
  7. 7.19² =
  8. 8.23² =
  9. 9.15² =
  10. 10.14² =
  11. 11.13² =
  12. 12.27² =
  13. 13.18² =
  14. 14.26² =
  15. 15.11² =
  16. 16.12² =
  17. 17.21² =
  18. 18.24² =
  19. 19.22² =
  20. 20.26² =
  21. 21.11² =
  22. 22.24² =
  23. 23.19² =
  24. 24.16² =
  25. 25.27² =
  26. 26.29² =
  27. 27.27² =
  28. 28.13² =
  29. 29.26² =
  30. 30.17² =
  31. 31.28² =
  32. 32.27² =
  33. 33.13² =
  34. 34.15² =
  35. 35.28² =
  36. 36.13² =
  37. 37.22² =
  38. 38.21² =
  39. 39.24² =
  40. 40.21² =

Answer key

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

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