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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 367 · 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. 3.14² =
  4. 4.29² =
  5. 5.26² =
  6. 6.22² =
  7. 7.11² =
  8. 8.13² =
  9. 9.23² =
  10. 10.25² =
  11. 11.28² =
  12. 12.15² =
  13. 13.17² =
  14. 14.18² =
  15. 15.21² =
  16. 16.16² =
  17. 17.12² =
  18. 18.27² =
  19. 19.16² =
  20. 20.22² =
  21. 21.18² =
  22. 22.16² =
  23. 23.21² =
  24. 24.27² =
  25. 25.28² =
  26. 26.21² =
  27. 27.21² =
  28. 28.15² =
  29. 29.26² =
  30. 30.22² =
  31. 31.13² =
  32. 32.21² =
  33. 33.29² =
  34. 34.19² =
  35. 35.11² =
  36. 36.15² =
  37. 37.25² =
  38. 38.29² =
  39. 39.21² =
  40. 40.21² =

Answer key

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

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