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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 969 · 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. 2.15² =
  3. 3.12² =
  4. 4.13² =
  5. 5.25² =
  6. 6.19² =
  7. 7.26² =
  8. 8.21² =
  9. 9.11² =
  10. 10.23² =
  11. 11.24² =
  12. 12.22² =
  13. 13.27² =
  14. 14.14² =
  15. 15.17² =
  16. 16.28² =
  17. 17.18² =
  18. 18.29² =
  19. 19.28² =
  20. 20.18² =
  21. 21.25² =
  22. 22.29² =
  23. 23.28² =
  24. 24.18² =
  25. 25.29² =
  26. 26.13² =
  27. 27.23² =
  28. 28.11² =
  29. 29.28² =
  30. 30.24² =
  31. 31.11² =
  32. 32.13² =
  33. 33.11² =
  34. 34.21² =
  35. 35.12² =
  36. 36.16² =
  37. 37.29² =
  38. 38.12² =
  39. 39.16² =
  40. 40.27² =

Answer key

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

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