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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 215 · 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. 2.18² =
  3. 3.22² =
  4. 4.26² =
  5. 5.15² =
  6. 6.17² =
  7. 7.13² =
  8. 8.21² =
  9. 9.24² =
  10. 10.25² =
  11. 11.19² =
  12. 12.12² =
  13. 13.11² =
  14. 14.27² =
  15. 15.29² =
  16. 16.14² =
  17. 17.16² =
  18. 18.13² =
  19. 19.23² =
  20. 20.24² =
  21. 21.16² =
  22. 22.23² =
  23. 23.13² =
  24. 24.24² =
  25. 25.23² =
  26. 26.13² =
  27. 27.11² =
  28. 28.19² =
  29. 29.24² =
  30. 30.27² =
  31. 31.28² =
  32. 32.17² =
  33. 33.11² =
  34. 34.21² =
  35. 35.11² =
  36. 36.11² =
  37. 37.17² =
  38. 38.13² =
  39. 39.21² =
  40. 40.14² =

Answer key

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

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