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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 150 · 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. 2.13² =
  3. 3.15² =
  4. 4.28² =
  5. 5.11² =
  6. 6.23² =
  7. 7.29² =
  8. 8.14² =
  9. 9.12² =
  10. 10.17² =
  11. 11.21² =
  12. 12.19² =
  13. 13.25² =
  14. 14.27² =
  15. 15.24² =
  16. 16.18² =
  17. 17.16² =
  18. 18.11² =
  19. 19.26² =
  20. 20.16² =
  21. 21.22² =
  22. 22.14² =
  23. 23.21² =
  24. 24.28² =
  25. 25.16² =
  26. 26.13² =
  27. 27.16² =
  28. 28.12² =
  29. 29.29² =
  30. 30.27² =
  31. 31.29² =
  32. 32.22² =
  33. 33.23² =
  34. 34.17² =
  35. 35.21² =
  36. 36.23² =
  37. 37.14² =
  38. 38.14² =
  39. 39.12² =
  40. 40.16² =

Answer key

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

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