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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 926 · 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. 1.11² =
  2. 2.21² =
  3. 3.15² =
  4. 4.19² =
  5. 5.24² =
  6. 6.29² =
  7. 7.13² =
  8. 8.14² =
  9. 9.25² =
  10. 10.18² =
  11. 11.16² =
  12. 12.28² =
  13. 13.27² =
  14. 14.22² =
  15. 15.12² =
  16. 16.13² =
  17. 17.23² =
  18. 18.26² =
  19. 19.17² =
  20. 20.15² =
  21. 21.26² =
  22. 22.17² =
  23. 23.23² =
  24. 24.13² =
  25. 25.26² =
  26. 26.23² =
  27. 27.22² =
  28. 28.11² =
  29. 29.15² =
  30. 30.13² =
  31. 31.25² =
  32. 32.28² =
  33. 33.29² =
  34. 34.25² =
  35. 35.26² =
  36. 36.12² =
  37. 37.24² =
  38. 38.14² =
  39. 39.11² =
  40. 40.15² =

Answer key

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

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