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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 834 · 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. 1.28² =
  2. 2.12² =
  3. 3.22² =
  4. 4.11² =
  5. 5.21² =
  6. 6.26² =
  7. 7.27² =
  8. 8.17² =
  9. 9.18² =
  10. 10.29² =
  11. 11.24² =
  12. 12.13² =
  13. 13.15² =
  14. 14.25² =
  15. 15.16² =
  16. 16.23² =
  17. 17.19² =
  18. 18.26² =
  19. 19.15² =
  20. 20.23² =
  21. 21.13² =
  22. 22.14² =
  23. 23.12² =
  24. 24.11² =
  25. 25.16² =
  26. 26.25² =
  27. 27.16² =
  28. 28.21² =
  29. 29.15² =
  30. 30.11² =
  31. 31.17² =
  32. 32.24² =
  33. 33.22² =
  34. 34.15² =
  35. 35.29² =
  36. 36.19² =
  37. 37.17² =
  38. 38.27² =
  39. 39.11² =
  40. 40.15² =

Answer key

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

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