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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 477 · 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. 1.26² =
  2. 2.28² =
  3. 3.14² =
  4. 4.24² =
  5. 5.25² =
  6. 6.23² =
  7. 7.11² =
  8. 8.17² =
  9. 9.12² =
  10. 10.27² =
  11. 11.29² =
  12. 12.16² =
  13. 13.15² =
  14. 14.13² =
  15. 15.19² =
  16. 16.21² =
  17. 17.22² =
  18. 18.22² =
  19. 19.13² =
  20. 20.23² =
  21. 21.18² =
  22. 22.29² =
  23. 23.17² =
  24. 24.28² =
  25. 25.25² =
  26. 26.16² =
  27. 27.11² =
  28. 28.14² =
  29. 29.14² =
  30. 30.28² =
  31. 31.17² =
  32. 32.23² =
  33. 33.18² =
  34. 34.21² =
  35. 35.22² =
  36. 36.11² =
  37. 37.29² =
  38. 38.29² =
  39. 39.14² =
  40. 40.29² =

Answer key

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

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