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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 233 · 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. 1.24² =
  2. 2.25² =
  3. 3.21² =
  4. 4.22² =
  5. 5.28² =
  6. 6.13² =
  7. 7.14² =
  8. 8.11² =
  9. 9.27² =
  10. 10.16² =
  11. 11.15² =
  12. 12.17² =
  13. 13.12² =
  14. 14.29² =
  15. 15.26² =
  16. 16.15² =
  17. 17.23² =
  18. 18.19² =
  19. 19.18² =
  20. 20.25² =
  21. 21.21² =
  22. 22.25² =
  23. 23.24² =
  24. 24.22² =
  25. 25.12² =
  26. 26.23² =
  27. 27.19² =
  28. 28.27² =
  29. 29.23² =
  30. 30.16² =
  31. 31.27² =
  32. 32.12² =
  33. 33.11² =
  34. 34.13² =
  35. 35.13² =
  36. 36.12² =
  37. 37.16² =
  38. 38.19² =
  39. 39.14² =
  40. 40.21² =

Answer key

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

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