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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 54 · 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. 2.15² =
  3. 3.17² =
  4. 4.27² =
  5. 5.22² =
  6. 6.11² =
  7. 7.16² =
  8. 8.26² =
  9. 9.29² =
  10. 10.25² =
  11. 11.18² =
  12. 12.21² =
  13. 13.23² =
  14. 14.19² =
  15. 15.13² =
  16. 16.17² =
  17. 17.14² =
  18. 18.12² =
  19. 19.24² =
  20. 20.21² =
  21. 21.16² =
  22. 22.16² =
  23. 23.27² =
  24. 24.23² =
  25. 25.15² =
  26. 26.15² =
  27. 27.24² =
  28. 28.27² =
  29. 29.16² =
  30. 30.27² =
  31. 31.14² =
  32. 32.16² =
  33. 33.12² =
  34. 34.13² =
  35. 35.24² =
  36. 36.13² =
  37. 37.25² =
  38. 38.26² =
  39. 39.15² =
  40. 40.19² =

Answer key

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

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