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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 510 · 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. 1.11² =
  2. 2.18² =
  3. 3.16² =
  4. 4.24² =
  5. 5.15² =
  6. 6.17² =
  7. 7.26² =
  8. 8.14² =
  9. 9.27² =
  10. 10.21² =
  11. 11.28² =
  12. 12.25² =
  13. 13.12² =
  14. 14.13² =
  15. 15.23² =
  16. 16.26² =
  17. 17.22² =
  18. 18.19² =
  19. 19.29² =
  20. 20.17² =
  21. 21.22² =
  22. 22.24² =
  23. 23.13² =
  24. 24.11² =
  25. 25.11² =
  26. 26.29² =
  27. 27.18² =
  28. 28.21² =
  29. 29.27² =
  30. 30.19² =
  31. 31.12² =
  32. 32.11² =
  33. 33.23² =
  34. 34.24² =
  35. 35.16² =
  36. 36.16² =
  37. 37.13² =
  38. 38.21² =
  39. 39.17² =
  40. 40.21² =

Answer key

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

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