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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 88 · 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. 2.18² =
  3. 3.24² =
  4. 4.21² =
  5. 5.13² =
  6. 6.25² =
  7. 7.28² =
  8. 8.27² =
  9. 9.29² =
  10. 10.26² =
  11. 11.19² =
  12. 12.15² =
  13. 13.16² =
  14. 14.22² =
  15. 15.23² =
  16. 16.11² =
  17. 17.17² =
  18. 18.12² =
  19. 19.14² =
  20. 20.27² =
  21. 21.28² =
  22. 22.15² =
  23. 23.22² =
  24. 24.13² =
  25. 25.13² =
  26. 26.18² =
  27. 27.13² =
  28. 28.13² =
  29. 29.14² =
  30. 30.28² =
  31. 31.12² =
  32. 32.16² =
  33. 33.27² =
  34. 34.22² =
  35. 35.14² =
  36. 36.27² =
  37. 37.18² =
  38. 38.19² =
  39. 39.24² =
  40. 40.17² =

Answer key

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

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