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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 283 · 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. 1.21² =
  2. 2.25² =
  3. 3.11² =
  4. 4.13² =
  5. 5.28² =
  6. 6.19² =
  7. 7.23² =
  8. 8.17² =
  9. 9.22² =
  10. 10.26² =
  11. 11.27² =
  12. 12.14² =
  13. 13.18² =
  14. 14.12² =
  15. 15.16² =
  16. 16.24² =
  17. 17.15² =
  18. 18.29² =
  19. 19.25² =
  20. 20.16² =
  21. 21.15² =
  22. 22.24² =
  23. 23.21² =
  24. 24.11² =
  25. 25.13² =
  26. 26.27² =
  27. 27.29² =
  28. 28.28² =
  29. 29.18² =
  30. 30.26² =
  31. 31.16² =
  32. 32.12² =
  33. 33.28² =
  34. 34.27² =
  35. 35.19² =
  36. 36.13² =
  37. 37.24² =
  38. 38.24² =
  39. 39.12² =
  40. 40.28² =

Answer key

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

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