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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 154 · 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. 1.28² =
  2. 2.11² =
  3. 3.14² =
  4. 4.21² =
  5. 5.17² =
  6. 6.27² =
  7. 7.12² =
  8. 8.13² =
  9. 9.25² =
  10. 10.22² =
  11. 11.23² =
  12. 12.19² =
  13. 13.26² =
  14. 14.15² =
  15. 15.16² =
  16. 16.24² =
  17. 17.18² =
  18. 18.22² =
  19. 19.26² =
  20. 20.24² =
  21. 21.28² =
  22. 22.29² =
  23. 23.19² =
  24. 24.13² =
  25. 25.19² =
  26. 26.27² =
  27. 27.18² =
  28. 28.26² =
  29. 29.12² =
  30. 30.17² =
  31. 31.18² =
  32. 32.19² =
  33. 33.14² =
  34. 34.15² =
  35. 35.16² =
  36. 36.29² =
  37. 37.18² =
  38. 38.27² =
  39. 39.29² =
  40. 40.21² =

Answer key

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

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