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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 938 · 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. 2.15² =
  3. 3.11² =
  4. 4.21² =
  5. 5.25² =
  6. 6.16² =
  7. 7.23² =
  8. 8.24² =
  9. 9.13² =
  10. 10.14² =
  11. 11.29² =
  12. 12.28² =
  13. 13.18² =
  14. 14.19² =
  15. 15.26² =
  16. 16.29² =
  17. 17.22² =
  18. 18.12² =
  19. 19.27² =
  20. 20.29² =
  21. 21.23² =
  22. 22.17² =
  23. 23.19² =
  24. 24.22² =
  25. 25.18² =
  26. 26.21² =
  27. 27.25² =
  28. 28.28² =
  29. 29.22² =
  30. 30.29² =
  31. 31.28² =
  32. 32.22² =
  33. 33.29² =
  34. 34.17² =
  35. 35.22² =
  36. 36.21² =
  37. 37.14² =
  38. 38.11² =
  39. 39.27² =
  40. 40.25² =

Answer key

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

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