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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 84 · 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. 1.27² =
  2. 2.11² =
  3. 3.14² =
  4. 4.12² =
  5. 5.18² =
  6. 6.22² =
  7. 7.13² =
  8. 8.28² =
  9. 9.21² =
  10. 10.19² =
  11. 11.16² =
  12. 12.15² =
  13. 13.17² =
  14. 14.23² =
  15. 15.26² =
  16. 16.24² =
  17. 17.25² =
  18. 18.29² =
  19. 19.11² =
  20. 20.21² =
  21. 21.14² =
  22. 22.19² =
  23. 23.29² =
  24. 24.24² =
  25. 25.14² =
  26. 26.12² =
  27. 27.23² =
  28. 28.13² =
  29. 29.27² =
  30. 30.24² =
  31. 31.25² =
  32. 32.12² =
  33. 33.28² =
  34. 34.26² =
  35. 35.13² =
  36. 36.17² =
  37. 37.16² =
  38. 38.26² =
  39. 39.29² =
  40. 40.12² =

Answer key

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

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