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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 210 · 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. 2.19² =
  3. 3.25² =
  4. 4.18² =
  5. 5.23² =
  6. 6.12² =
  7. 7.14² =
  8. 8.21² =
  9. 9.15² =
  10. 10.17² =
  11. 11.11² =
  12. 12.28² =
  13. 13.29² =
  14. 14.22² =
  15. 15.13² =
  16. 16.26² =
  17. 17.24² =
  18. 18.22² =
  19. 19.16² =
  20. 20.14² =
  21. 21.27² =
  22. 22.24² =
  23. 23.12² =
  24. 24.13² =
  25. 25.17² =
  26. 26.22² =
  27. 27.15² =
  28. 28.11² =
  29. 29.17² =
  30. 30.18² =
  31. 31.21² =
  32. 32.18² =
  33. 33.19² =
  34. 34.15² =
  35. 35.14² =
  36. 36.28² =
  37. 37.13² =
  38. 38.15² =
  39. 39.14² =
  40. 40.19² =

Answer key

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

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