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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 650 · 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. 2.18² =
  3. 3.13² =
  4. 4.17² =
  5. 5.15² =
  6. 6.29² =
  7. 7.19² =
  8. 8.26² =
  9. 9.14² =
  10. 10.11² =
  11. 11.29² =
  12. 12.22² =
  13. 13.21² =
  14. 14.25² =
  15. 15.16² =
  16. 16.18² =
  17. 17.23² =
  18. 18.12² =
  19. 19.23² =
  20. 20.28² =
  21. 21.27² =
  22. 22.12² =
  23. 23.26² =
  24. 24.22² =
  25. 25.11² =
  26. 26.17² =
  27. 27.27² =
  28. 28.19² =
  29. 29.13² =
  30. 30.27² =
  31. 31.18² =
  32. 32.24² =
  33. 33.28² =
  34. 34.11² =
  35. 35.29² =
  36. 36.21² =
  37. 37.21² =
  38. 38.17² =
  39. 39.16² =
  40. 40.16² =

Answer key

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

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