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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 620 · 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. 1.23² =
  2. 2.14² =
  3. 3.21² =
  4. 4.11² =
  5. 5.17² =
  6. 6.29² =
  7. 7.15² =
  8. 8.16² =
  9. 9.12² =
  10. 10.27² =
  11. 11.24² =
  12. 12.19² =
  13. 13.25² =
  14. 14.22² =
  15. 15.27² =
  16. 16.28² =
  17. 17.26² =
  18. 18.13² =
  19. 19.19² =
  20. 20.19² =
  21. 21.21² =
  22. 22.27² =
  23. 23.18² =
  24. 24.24² =
  25. 25.11² =
  26. 26.23² =
  27. 27.29² =
  28. 28.18² =
  29. 29.16² =
  30. 30.15² =
  31. 31.12² =
  32. 32.28² =
  33. 33.14² =
  34. 34.28² =
  35. 35.18² =
  36. 36.12² =
  37. 37.19² =
  38. 38.26² =
  39. 39.11² =
  40. 40.28² =

Answer key

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

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