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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 476 · 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. 1.24² =
  2. 2.21² =
  3. 3.29² =
  4. 4.16² =
  5. 5.17² =
  6. 6.12² =
  7. 7.13² =
  8. 8.18² =
  9. 9.14² =
  10. 10.25² =
  11. 11.26² =
  12. 12.27² =
  13. 13.23² =
  14. 14.19² =
  15. 15.11² =
  16. 16.15² =
  17. 17.22² =
  18. 18.28² =
  19. 19.11² =
  20. 20.26² =
  21. 21.19² =
  22. 22.28² =
  23. 23.12² =
  24. 24.24² =
  25. 25.11² =
  26. 26.23² =
  27. 27.21² =
  28. 28.24² =
  29. 29.12² =
  30. 30.12² =
  31. 31.14² =
  32. 32.14² =
  33. 33.28² =
  34. 34.14² =
  35. 35.23² =
  36. 36.14² =
  37. 37.27² =
  38. 38.16² =
  39. 39.24² =
  40. 40.15² =

Answer key

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

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