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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 998 · 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. 1.12² =
  2. 2.14² =
  3. 3.24² =
  4. 4.29² =
  5. 5.21² =
  6. 6.13² =
  7. 7.11² =
  8. 8.18² =
  9. 9.19² =
  10. 10.28² =
  11. 11.16² =
  12. 12.17² =
  13. 13.22² =
  14. 14.25² =
  15. 15.15² =
  16. 16.26² =
  17. 17.22² =
  18. 18.23² =
  19. 19.21² =
  20. 20.27² =
  21. 21.14² =
  22. 22.16² =
  23. 23.19² =
  24. 24.15² =
  25. 25.17² =
  26. 26.17² =
  27. 27.11² =
  28. 28.22² =
  29. 29.25² =
  30. 30.21² =
  31. 31.12² =
  32. 32.18² =
  33. 33.14² =
  34. 34.21² =
  35. 35.22² =
  36. 36.21² =
  37. 37.18² =
  38. 38.29² =
  39. 39.12² =
  40. 40.11² =

Answer key

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

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