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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 987 · 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. 1.13² =
  2. 2.17² =
  3. 3.18² =
  4. 4.29² =
  5. 5.21² =
  6. 6.23² =
  7. 7.22² =
  8. 8.16² =
  9. 9.15² =
  10. 10.14² =
  11. 11.11² =
  12. 12.28² =
  13. 13.12² =
  14. 14.19² =
  15. 15.26² =
  16. 16.18² =
  17. 17.24² =
  18. 18.17² =
  19. 19.27² =
  20. 20.25² =
  21. 21.12² =
  22. 22.18² =
  23. 23.28² =
  24. 24.23² =
  25. 25.15² =
  26. 26.22² =
  27. 27.27² =
  28. 28.11² =
  29. 29.17² =
  30. 30.17² =
  31. 31.21² =
  32. 32.29² =
  33. 33.28² =
  34. 34.12² =
  35. 35.21² =
  36. 36.21² =
  37. 37.13² =
  38. 38.28² =
  39. 39.23² =
  40. 40.19² =

Answer key

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

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