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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 982 · 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. 1.14² =
  2. 2.13² =
  3. 3.21² =
  4. 4.11² =
  5. 5.19² =
  6. 6.18² =
  7. 7.27² =
  8. 8.23² =
  9. 9.12² =
  10. 10.26² =
  11. 11.25² =
  12. 12.24² =
  13. 13.17² =
  14. 14.16² =
  15. 15.28² =
  16. 16.15² =
  17. 17.22² =
  18. 18.11² =
  19. 19.29² =
  20. 20.21² =
  21. 21.14² =
  22. 22.12² =
  23. 23.13² =
  24. 24.27² =
  25. 25.14² =
  26. 26.15² =
  27. 27.14² =
  28. 28.22² =
  29. 29.12² =
  30. 30.14² =
  31. 31.12² =
  32. 32.12² =
  33. 33.27² =
  34. 34.21² =
  35. 35.13² =
  36. 36.14² =
  37. 37.27² =
  38. 38.26² =
  39. 39.28² =
  40. 40.19² =

Answer key

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

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