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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 940 · 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. 1.22² =
  2. 2.27² =
  3. 3.28² =
  4. 4.19² =
  5. 5.21² =
  6. 6.25² =
  7. 7.16² =
  8. 8.11² =
  9. 9.17² =
  10. 10.14² =
  11. 11.13² =
  12. 12.23² =
  13. 13.26² =
  14. 14.24² =
  15. 15.15² =
  16. 16.12² =
  17. 17.29² =
  18. 18.18² =
  19. 19.21² =
  20. 20.24² =
  21. 21.29² =
  22. 22.25² =
  23. 23.17² =
  24. 24.21² =
  25. 25.12² =
  26. 26.23² =
  27. 27.16² =
  28. 28.24² =
  29. 29.13² =
  30. 30.13² =
  31. 31.11² =
  32. 32.21² =
  33. 33.23² =
  34. 34.28² =
  35. 35.14² =
  36. 36.29² =
  37. 37.18² =
  38. 38.23² =
  39. 39.17² =
  40. 40.26² =

Answer key

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

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