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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 158 · 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. 1.17² =
  2. 2.13² =
  3. 3.16² =
  4. 4.21² =
  5. 5.18² =
  6. 6.25² =
  7. 7.28² =
  8. 8.11² =
  9. 9.27² =
  10. 10.12² =
  11. 11.22² =
  12. 12.29² =
  13. 13.19² =
  14. 14.23² =
  15. 15.22² =
  16. 16.24² =
  17. 17.15² =
  18. 18.28² =
  19. 19.26² =
  20. 20.27² =
  21. 21.25² =
  22. 22.17² =
  23. 23.14² =
  24. 24.12² =
  25. 25.25² =
  26. 26.28² =
  27. 27.13² =
  28. 28.16² =
  29. 29.17² =
  30. 30.19² =
  31. 31.25² =
  32. 32.19² =
  33. 33.14² =
  34. 34.25² =
  35. 35.28² =
  36. 36.14² =
  37. 37.26² =
  38. 38.28² =
  39. 39.12² =
  40. 40.21² =

Answer key

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

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