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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 962 · 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. 1.15² =
  2. 2.25² =
  3. 3.11² =
  4. 4.14² =
  5. 5.28² =
  6. 6.12² =
  7. 7.13² =
  8. 8.22² =
  9. 9.26² =
  10. 10.24² =
  11. 11.29² =
  12. 12.18² =
  13. 13.16² =
  14. 14.17² =
  15. 15.21² =
  16. 16.12² =
  17. 17.27² =
  18. 18.23² =
  19. 19.27² =
  20. 20.28² =
  21. 21.19² =
  22. 22.27² =
  23. 23.19² =
  24. 24.12² =
  25. 25.14² =
  26. 26.27² =
  27. 27.12² =
  28. 28.21² =
  29. 29.29² =
  30. 30.28² =
  31. 31.24² =
  32. 32.28² =
  33. 33.21² =
  34. 34.18² =
  35. 35.13² =
  36. 36.21² =
  37. 37.24² =
  38. 38.13² =
  39. 39.14² =
  40. 40.22² =

Answer key

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

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