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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 362 · 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. 1.14² =
  2. 2.15² =
  3. 3.16² =
  4. 4.24² =
  5. 5.11² =
  6. 6.17² =
  7. 7.23² =
  8. 8.18² =
  9. 9.26² =
  10. 10.22² =
  11. 11.27² =
  12. 12.12² =
  13. 13.21² =
  14. 14.13² =
  15. 15.28² =
  16. 16.29² =
  17. 17.19² =
  18. 18.28² =
  19. 19.25² =
  20. 20.17² =
  21. 21.25² =
  22. 22.13² =
  23. 23.15² =
  24. 24.28² =
  25. 25.19² =
  26. 26.29² =
  27. 27.28² =
  28. 28.25² =
  29. 29.11² =
  30. 30.19² =
  31. 31.22² =
  32. 32.24² =
  33. 33.16² =
  34. 34.27² =
  35. 35.22² =
  36. 36.26² =
  37. 37.29² =
  38. 38.25² =
  39. 39.18² =
  40. 40.21² =

Answer key

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

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