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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 467 · 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. 1.16² =
  2. 2.11² =
  3. 3.28² =
  4. 4.14² =
  5. 5.21² =
  6. 6.13² =
  7. 7.24² =
  8. 8.25² =
  9. 9.15² =
  10. 10.22² =
  11. 11.23² =
  12. 12.17² =
  13. 13.26² =
  14. 14.27² =
  15. 15.19² =
  16. 16.14² =
  17. 17.12² =
  18. 18.18² =
  19. 19.29² =
  20. 20.25² =
  21. 21.25² =
  22. 22.21² =
  23. 23.13² =
  24. 24.21² =
  25. 25.11² =
  26. 26.12² =
  27. 27.16² =
  28. 28.23² =
  29. 29.24² =
  30. 30.12² =
  31. 31.18² =
  32. 32.13² =
  33. 33.19² =
  34. 34.25² =
  35. 35.28² =
  36. 36.27² =
  37. 37.23² =
  38. 38.22² =
  39. 39.19² =
  40. 40.28² =

Answer key

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

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