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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 907 · 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. 1.17² =
  2. 2.12² =
  3. 3.25² =
  4. 4.19² =
  5. 5.27² =
  6. 6.24² =
  7. 7.13² =
  8. 8.21² =
  9. 9.15² =
  10. 10.29² =
  11. 11.26² =
  12. 12.14² =
  13. 13.16² =
  14. 14.23² =
  15. 15.18² =
  16. 16.11² =
  17. 17.22² =
  18. 18.28² =
  19. 19.11² =
  20. 20.28² =
  21. 21.24² =
  22. 22.12² =
  23. 23.28² =
  24. 24.28² =
  25. 25.21² =
  26. 26.13² =
  27. 27.24² =
  28. 28.24² =
  29. 29.19² =
  30. 30.26² =
  31. 31.12² =
  32. 32.12² =
  33. 33.16² =
  34. 34.21² =
  35. 35.28² =
  36. 36.19² =
  37. 37.23² =
  38. 38.18² =
  39. 39.21² =
  40. 40.22² =

Answer key

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

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