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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 904 · 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. 2.15² =
  3. 3.28² =
  4. 4.24² =
  5. 5.29² =
  6. 6.21² =
  7. 7.23² =
  8. 8.26² =
  9. 9.14² =
  10. 10.17² =
  11. 11.11² =
  12. 12.12² =
  13. 13.16² =
  14. 14.13² =
  15. 15.27² =
  16. 16.18² =
  17. 17.15² =
  18. 18.25² =
  19. 19.19² =
  20. 20.16² =
  21. 21.11² =
  22. 22.27² =
  23. 23.15² =
  24. 24.24² =
  25. 25.21² =
  26. 26.11² =
  27. 27.27² =
  28. 28.14² =
  29. 29.19² =
  30. 30.17² =
  31. 31.11² =
  32. 32.16² =
  33. 33.21² =
  34. 34.29² =
  35. 35.13² =
  36. 36.13² =
  37. 37.19² =
  38. 38.21² =
  39. 39.29² =
  40. 40.22² =

Answer key

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

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