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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 456 · 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. 1.21² =
  2. 2.16² =
  3. 3.27² =
  4. 4.29² =
  5. 5.28² =
  6. 6.23² =
  7. 7.19² =
  8. 8.22² =
  9. 9.14² =
  10. 10.18² =
  11. 11.24² =
  12. 12.26² =
  13. 13.11² =
  14. 14.13² =
  15. 15.17² =
  16. 16.25² =
  17. 17.11² =
  18. 18.12² =
  19. 19.15² =
  20. 20.28² =
  21. 21.14² =
  22. 22.24² =
  23. 23.18² =
  24. 24.11² =
  25. 25.24² =
  26. 26.21² =
  27. 27.15² =
  28. 28.22² =
  29. 29.28² =
  30. 30.22² =
  31. 31.27² =
  32. 32.21² =
  33. 33.27² =
  34. 34.19² =
  35. 35.11² =
  36. 36.14² =
  37. 37.17² =
  38. 38.28² =
  39. 39.14² =
  40. 40.13² =

Answer key

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

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