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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 189 · 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. 1.29² =
  2. 2.24² =
  3. 3.27² =
  4. 4.19² =
  5. 5.25² =
  6. 6.15² =
  7. 7.14² =
  8. 8.21² =
  9. 9.17² =
  10. 10.22² =
  11. 11.23² =
  12. 12.13² =
  13. 13.11² =
  14. 14.18² =
  15. 15.26² =
  16. 16.16² =
  17. 17.28² =
  18. 18.18² =
  19. 19.28² =
  20. 20.12² =
  21. 21.21² =
  22. 22.15² =
  23. 23.14² =
  24. 24.19² =
  25. 25.13² =
  26. 26.29² =
  27. 27.21² =
  28. 28.27² =
  29. 29.28² =
  30. 30.29² =
  31. 31.24² =
  32. 32.21² =
  33. 33.23² =
  34. 34.29² =
  35. 35.28² =
  36. 36.26² =
  37. 37.28² =
  38. 38.29² =
  39. 39.19² =
  40. 40.21² =

Answer key

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

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