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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 912 · 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. 1.24² =
  2. 2.29² =
  3. 3.18² =
  4. 4.13² =
  5. 5.23² =
  6. 6.21² =
  7. 7.28² =
  8. 8.27² =
  9. 9.14² =
  10. 10.16² =
  11. 11.25² =
  12. 12.12² =
  13. 13.15² =
  14. 14.17² =
  15. 15.11² =
  16. 16.22² =
  17. 17.22² =
  18. 18.19² =
  19. 19.26² =
  20. 20.19² =
  21. 21.11² =
  22. 22.25² =
  23. 23.29² =
  24. 24.16² =
  25. 25.24² =
  26. 26.12² =
  27. 27.28² =
  28. 28.18² =
  29. 29.28² =
  30. 30.24² =
  31. 31.12² =
  32. 32.11² =
  33. 33.28² =
  34. 34.17² =
  35. 35.28² =
  36. 36.23² =
  37. 37.19² =
  38. 38.13² =
  39. 39.21² =
  40. 40.24² =

Answer key

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

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