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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 939 · 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. 1.19² =
  2. 2.21² =
  3. 3.22² =
  4. 4.16² =
  5. 5.28² =
  6. 6.25² =
  7. 7.13² =
  8. 8.26² =
  9. 9.29² =
  10. 10.17² =
  11. 11.18² =
  12. 12.12² =
  13. 13.27² =
  14. 14.24² =
  15. 15.11² =
  16. 16.14² =
  17. 17.15² =
  18. 18.23² =
  19. 19.15² =
  20. 20.14² =
  21. 21.12² =
  22. 22.27² =
  23. 23.17² =
  24. 24.22² =
  25. 25.28² =
  26. 26.28² =
  27. 27.21² =
  28. 28.13² =
  29. 29.22² =
  30. 30.15² =
  31. 31.13² =
  32. 32.21² =
  33. 33.16² =
  34. 34.21² =
  35. 35.24² =
  36. 36.25² =
  37. 37.22² =
  38. 38.29² =
  39. 39.15² =
  40. 40.13² =

Answer key

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

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