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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 954 · 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. 1.12² =
  2. 2.18² =
  3. 3.27² =
  4. 4.21² =
  5. 5.11² =
  6. 6.22² =
  7. 7.16² =
  8. 8.26² =
  9. 9.28² =
  10. 10.23² =
  11. 11.17² =
  12. 12.25² =
  13. 13.15² =
  14. 14.19² =
  15. 15.29² =
  16. 16.13² =
  17. 17.17² =
  18. 18.14² =
  19. 19.24² =
  20. 20.13² =
  21. 21.14² =
  22. 22.21² =
  23. 23.24² =
  24. 24.26² =
  25. 25.28² =
  26. 26.13² =
  27. 27.26² =
  28. 28.16² =
  29. 29.18² =
  30. 30.12² =
  31. 31.26² =
  32. 32.11² =
  33. 33.21² =
  34. 34.26² =
  35. 35.23² =
  36. 36.28² =
  37. 37.26² =
  38. 38.11² =
  39. 39.18² =
  40. 40.25² =

Answer key

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

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