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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 428 · 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. 1.22² =
  2. 2.15² =
  3. 3.24² =
  4. 4.13² =
  5. 5.16² =
  6. 6.14² =
  7. 7.21² =
  8. 8.17² =
  9. 9.19² =
  10. 10.12² =
  11. 11.27² =
  12. 12.18² =
  13. 13.11² =
  14. 14.25² =
  15. 15.23² =
  16. 16.29² =
  17. 17.11² =
  18. 18.28² =
  19. 19.19² =
  20. 20.17² =
  21. 21.21² =
  22. 22.27² =
  23. 23.19² =
  24. 24.26² =
  25. 25.15² =
  26. 26.28² =
  27. 27.22² =
  28. 28.15² =
  29. 29.12² =
  30. 30.22² =
  31. 31.14² =
  32. 32.13² =
  33. 33.11² =
  34. 34.11² =
  35. 35.16² =
  36. 36.27² =
  37. 37.25² =
  38. 38.26² =
  39. 39.16² =
  40. 40.24² =

Answer key

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

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