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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 216 · 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. 1.12² =
  2. 2.15² =
  3. 3.17² =
  4. 4.13² =
  5. 5.16² =
  6. 6.27² =
  7. 7.21² =
  8. 8.29² =
  9. 9.14² =
  10. 10.25² =
  11. 11.19² =
  12. 12.26² =
  13. 13.24² =
  14. 14.22² =
  15. 15.18² =
  16. 16.16² =
  17. 17.23² =
  18. 18.26² =
  19. 19.13² =
  20. 20.28² =
  21. 21.28² =
  22. 22.11² =
  23. 23.27² =
  24. 24.13² =
  25. 25.24² =
  26. 26.18² =
  27. 27.27² =
  28. 28.15² =
  29. 29.24² =
  30. 30.14² =
  31. 31.15² =
  32. 32.24² =
  33. 33.28² =
  34. 34.15² =
  35. 35.28² =
  36. 36.18² =
  37. 37.16² =
  38. 38.21² =
  39. 39.11² =
  40. 40.24² =

Answer key

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

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