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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 521 · 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. 1.28² =
  2. 2.22² =
  3. 3.14² =
  4. 4.18² =
  5. 5.13² =
  6. 6.21² =
  7. 7.17² =
  8. 8.23² =
  9. 9.25² =
  10. 10.29² =
  11. 11.12² =
  12. 12.24² =
  13. 13.15² =
  14. 14.19² =
  15. 15.27² =
  16. 16.11² =
  17. 17.16² =
  18. 18.18² =
  19. 19.18² =
  20. 20.12² =
  21. 21.16² =
  22. 22.13² =
  23. 23.22² =
  24. 24.13² =
  25. 25.26² =
  26. 26.11² =
  27. 27.11² =
  28. 28.27² =
  29. 29.17² =
  30. 30.14² =
  31. 31.15² =
  32. 32.12² =
  33. 33.23² =
  34. 34.23² =
  35. 35.16² =
  36. 36.13² =
  37. 37.11² =
  38. 38.11² =
  39. 39.28² =
  40. 40.21² =

Answer key

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

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