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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 661 · 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. 1.15² =
  2. 2.22² =
  3. 3.21² =
  4. 4.11² =
  5. 5.29² =
  6. 6.27² =
  7. 7.18² =
  8. 8.12² =
  9. 9.28² =
  10. 10.19² =
  11. 11.24² =
  12. 12.26² =
  13. 13.13² =
  14. 14.17² =
  15. 15.23² =
  16. 16.14² =
  17. 17.21² =
  18. 18.25² =
  19. 19.26² =
  20. 20.16² =
  21. 21.23² =
  22. 22.24² =
  23. 23.19² =
  24. 24.17² =
  25. 25.27² =
  26. 26.27² =
  27. 27.16² =
  28. 28.17² =
  29. 29.11² =
  30. 30.22² =
  31. 31.16² =
  32. 32.29² =
  33. 33.27² =
  34. 34.11² =
  35. 35.19² =
  36. 36.22² =
  37. 37.21² =
  38. 38.28² =
  39. 39.15² =
  40. 40.24² =

Answer key

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

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