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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 922 · 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. 1.16² =
  2. 2.12² =
  3. 3.13² =
  4. 4.14² =
  5. 5.26² =
  6. 6.17² =
  7. 7.21² =
  8. 8.11² =
  9. 9.19² =
  10. 10.28² =
  11. 11.25² =
  12. 12.24² =
  13. 13.27² =
  14. 14.15² =
  15. 15.22² =
  16. 16.18² =
  17. 17.29² =
  18. 18.16² =
  19. 19.16² =
  20. 20.23² =
  21. 21.16² =
  22. 22.11² =
  23. 23.13² =
  24. 24.24² =
  25. 25.21² =
  26. 26.19² =
  27. 27.22² =
  28. 28.11² =
  29. 29.25² =
  30. 30.13² =
  31. 31.11² =
  32. 32.27² =
  33. 33.14² =
  34. 34.12² =
  35. 35.14² =
  36. 36.14² =
  37. 37.23² =
  38. 38.16² =
  39. 39.18² =
  40. 40.21² =

Answer key

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

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