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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 64 · 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. 2.11² =
  3. 3.14² =
  4. 4.21² =
  5. 5.19² =
  6. 6.29² =
  7. 7.22² =
  8. 8.24² =
  9. 9.17² =
  10. 10.18² =
  11. 11.27² =
  12. 12.23² =
  13. 13.15² =
  14. 14.25² =
  15. 15.16² =
  16. 16.26² =
  17. 17.13² =
  18. 18.28² =
  19. 19.21² =
  20. 20.13² =
  21. 21.16² =
  22. 22.23² =
  23. 23.19² =
  24. 24.22² =
  25. 25.22² =
  26. 26.16² =
  27. 27.24² =
  28. 28.15² =
  29. 29.13² =
  30. 30.13² =
  31. 31.23² =
  32. 32.25² =
  33. 33.19² =
  34. 34.12² =
  35. 35.17² =
  36. 36.16² =
  37. 37.23² =
  38. 38.21² =
  39. 39.24² =
  40. 40.28² =

Answer key

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

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