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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 642 · 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. 2.29² =
  3. 3.16² =
  4. 4.14² =
  5. 5.19² =
  6. 6.22² =
  7. 7.15² =
  8. 8.11² =
  9. 9.18² =
  10. 10.21² =
  11. 11.25² =
  12. 12.12² =
  13. 13.17² =
  14. 14.23² =
  15. 15.28² =
  16. 16.24² =
  17. 17.27² =
  18. 18.26² =
  19. 19.13² =
  20. 20.28² =
  21. 21.28² =
  22. 22.25² =
  23. 23.14² =
  24. 24.26² =
  25. 25.13² =
  26. 26.17² =
  27. 27.19² =
  28. 28.15² =
  29. 29.21² =
  30. 30.24² =
  31. 31.27² =
  32. 32.17² =
  33. 33.29² =
  34. 34.23² =
  35. 35.27² =
  36. 36.14² =
  37. 37.19² =
  38. 38.29² =
  39. 39.14² =
  40. 40.21² =

Answer key

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

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