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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 345 · 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. 2.13² =
  3. 3.12² =
  4. 4.25² =
  5. 5.18² =
  6. 6.29² =
  7. 7.22² =
  8. 8.11² =
  9. 9.17² =
  10. 10.14² =
  11. 11.16² =
  12. 12.19² =
  13. 13.21² =
  14. 14.26² =
  15. 15.15² =
  16. 16.24² =
  17. 17.23² =
  18. 18.28² =
  19. 19.27² =
  20. 20.24² =
  21. 21.21² =
  22. 22.16² =
  23. 23.28² =
  24. 24.19² =
  25. 25.24² =
  26. 26.15² =
  27. 27.21² =
  28. 28.12² =
  29. 29.28² =
  30. 30.14² =
  31. 31.16² =
  32. 32.17² =
  33. 33.22² =
  34. 34.23² =
  35. 35.16² =
  36. 36.11² =
  37. 37.13² =
  38. 38.11² =
  39. 39.16² =
  40. 40.26² =

Answer key

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

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