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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 184 · 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. 1.11² =
  2. 2.25² =
  3. 3.19² =
  4. 4.22² =
  5. 5.18² =
  6. 6.23² =
  7. 7.21² =
  8. 8.14² =
  9. 9.24² =
  10. 10.13² =
  11. 11.27² =
  12. 12.17² =
  13. 13.12² =
  14. 14.28² =
  15. 15.15² =
  16. 16.26² =
  17. 17.29² =
  18. 18.17² =
  19. 19.24² =
  20. 20.29² =
  21. 21.16² =
  22. 22.16² =
  23. 23.17² =
  24. 24.28² =
  25. 25.11² =
  26. 26.21² =
  27. 27.29² =
  28. 28.25² =
  29. 29.16² =
  30. 30.19² =
  31. 31.22² =
  32. 32.28² =
  33. 33.13² =
  34. 34.22² =
  35. 35.17² =
  36. 36.19² =
  37. 37.24² =
  38. 38.12² =
  39. 39.16² =
  40. 40.21² =

Answer key

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

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