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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 156 · 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. 1.29² =
  2. 2.22² =
  3. 3.18² =
  4. 4.17² =
  5. 5.13² =
  6. 6.21² =
  7. 7.28² =
  8. 8.25² =
  9. 9.24² =
  10. 10.19² =
  11. 11.27² =
  12. 12.12² =
  13. 13.26² =
  14. 14.16² =
  15. 15.15² =
  16. 16.11² =
  17. 17.14² =
  18. 18.29² =
  19. 19.23² =
  20. 20.13² =
  21. 21.24² =
  22. 22.14² =
  23. 23.17² =
  24. 24.21² =
  25. 25.17² =
  26. 26.24² =
  27. 27.21² =
  28. 28.17² =
  29. 29.25² =
  30. 30.29² =
  31. 31.16² =
  32. 32.18² =
  33. 33.12² =
  34. 34.28² =
  35. 35.28² =
  36. 36.14² =
  37. 37.25² =
  38. 38.19² =
  39. 39.13² =
  40. 40.12² =

Answer key

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

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