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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 316 · 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. 1.16² =
  2. 2.29² =
  3. 3.28² =
  4. 4.13² =
  5. 5.19² =
  6. 6.11² =
  7. 7.22² =
  8. 8.21² =
  9. 9.27² =
  10. 10.15² =
  11. 11.25² =
  12. 12.24² =
  13. 13.14² =
  14. 14.12² =
  15. 15.23² =
  16. 16.17² =
  17. 17.26² =
  18. 18.18² =
  19. 19.15² =
  20. 20.13² =
  21. 21.24² =
  22. 22.14² =
  23. 23.21² =
  24. 24.16² =
  25. 25.24² =
  26. 26.19² =
  27. 27.18² =
  28. 28.12² =
  29. 29.26² =
  30. 30.24² =
  31. 31.26² =
  32. 32.22² =
  33. 33.12² =
  34. 34.27² =
  35. 35.24² =
  36. 36.17² =
  37. 37.23² =
  38. 38.13² =
  39. 39.28² =
  40. 40.21² =

Answer key

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

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