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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 899 · 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. 2.25² =
  3. 3.13² =
  4. 4.24² =
  5. 5.12² =
  6. 6.14² =
  7. 7.21² =
  8. 8.17² =
  9. 9.19² =
  10. 10.28² =
  11. 11.27² =
  12. 12.26² =
  13. 13.11² =
  14. 14.15² =
  15. 15.12² =
  16. 16.18² =
  17. 17.22² =
  18. 18.29² =
  19. 19.23² =
  20. 20.16² =
  21. 21.23² =
  22. 22.22² =
  23. 23.22² =
  24. 24.16² =
  25. 25.19² =
  26. 26.28² =
  27. 27.21² =
  28. 28.27² =
  29. 29.18² =
  30. 30.26² =
  31. 31.17² =
  32. 32.21² =
  33. 33.16² =
  34. 34.17² =
  35. 35.13² =
  36. 36.14² =
  37. 37.21² =
  38. 38.14² =
  39. 39.22² =
  40. 40.16² =

Answer key

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

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