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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 942 · 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. 1.28² =
  2. 2.21² =
  3. 3.12² =
  4. 4.29² =
  5. 5.13² =
  6. 6.15² =
  7. 7.11² =
  8. 8.18² =
  9. 9.14² =
  10. 10.19² =
  11. 11.24² =
  12. 12.22² =
  13. 13.16² =
  14. 14.25² =
  15. 15.23² =
  16. 16.17² =
  17. 17.27² =
  18. 18.12² =
  19. 19.14² =
  20. 20.17² =
  21. 21.26² =
  22. 22.25² =
  23. 23.28² =
  24. 24.28² =
  25. 25.11² =
  26. 26.15² =
  27. 27.14² =
  28. 28.25² =
  29. 29.24² =
  30. 30.21² =
  31. 31.12² =
  32. 32.22² =
  33. 33.11² =
  34. 34.14² =
  35. 35.13² =
  36. 36.12² =
  37. 37.29² =
  38. 38.24² =
  39. 39.11² =
  40. 40.23² =

Answer key

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

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