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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 737 · 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. 2.23² =
  3. 3.15² =
  4. 4.29² =
  5. 5.27² =
  6. 6.25² =
  7. 7.16² =
  8. 8.21² =
  9. 9.14² =
  10. 10.24² =
  11. 11.17² =
  12. 12.12² =
  13. 13.13² =
  14. 14.22² =
  15. 15.18² =
  16. 16.11² =
  17. 17.21² =
  18. 18.13² =
  19. 19.22² =
  20. 20.26² =
  21. 21.25² =
  22. 22.11² =
  23. 23.19² =
  24. 24.29² =
  25. 25.28² =
  26. 26.12² =
  27. 27.22² =
  28. 28.17² =
  29. 29.11² =
  30. 30.17² =
  31. 31.27² =
  32. 32.14² =
  33. 33.22² =
  34. 34.11² =
  35. 35.11² =
  36. 36.14² =
  37. 37.17² =
  38. 38.28² =
  39. 39.13² =
  40. 40.19² =

Answer key

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

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