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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 309 · 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. 1.14² =
  2. 2.16² =
  3. 3.18² =
  4. 4.28² =
  5. 5.22² =
  6. 6.25² =
  7. 7.27² =
  8. 8.29² =
  9. 9.15² =
  10. 10.12² =
  11. 11.13² =
  12. 12.21² =
  13. 13.17² =
  14. 14.23² =
  15. 15.11² =
  16. 16.19² =
  17. 17.26² =
  18. 18.29² =
  19. 19.14² =
  20. 20.24² =
  21. 21.12² =
  22. 22.19² =
  23. 23.27² =
  24. 24.21² =
  25. 25.15² =
  26. 26.25² =
  27. 27.14² =
  28. 28.19² =
  29. 29.26² =
  30. 30.18² =
  31. 31.11² =
  32. 32.22² =
  33. 33.16² =
  34. 34.24² =
  35. 35.13² =
  36. 36.22² =
  37. 37.11² =
  38. 38.29² =
  39. 39.12² =
  40. 40.21² =

Answer key

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

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