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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 149 · 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. 1.16² =
  2. 2.11² =
  3. 3.13² =
  4. 4.18² =
  5. 5.22² =
  6. 6.17² =
  7. 7.24² =
  8. 8.21² =
  9. 9.14² =
  10. 10.12² =
  11. 11.25² =
  12. 12.29² =
  13. 13.27² =
  14. 14.19² =
  15. 15.26² =
  16. 16.15² =
  17. 17.13² =
  18. 18.23² =
  19. 19.24² =
  20. 20.23² =
  21. 21.28² =
  22. 22.27² =
  23. 23.15² =
  24. 24.17² =
  25. 25.24² =
  26. 26.18² =
  27. 27.29² =
  28. 28.16² =
  29. 29.19² =
  30. 30.19² =
  31. 31.21² =
  32. 32.18² =
  33. 33.11² =
  34. 34.18² =
  35. 35.19² =
  36. 36.18² =
  37. 37.16² =
  38. 38.15² =
  39. 39.25² =
  40. 40.21² =

Answer key

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

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