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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 941 · 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. 1.25² =
  2. 2.18² =
  3. 3.16² =
  4. 4.23² =
  5. 5.21² =
  6. 6.17² =
  7. 7.26² =
  8. 8.15² =
  9. 9.13² =
  10. 10.24² =
  11. 11.22² =
  12. 12.12² =
  13. 13.14² =
  14. 14.29² =
  15. 15.11² =
  16. 16.27² =
  17. 17.19² =
  18. 18.28² =
  19. 19.24² =
  20. 20.25² =
  21. 21.27² =
  22. 22.23² =
  23. 23.14² =
  24. 24.26² =
  25. 25.29² =
  26. 26.14² =
  27. 27.28² =
  28. 28.28² =
  29. 29.14² =
  30. 30.19² =
  31. 31.13² =
  32. 32.24² =
  33. 33.21² =
  34. 34.21² =
  35. 35.11² =
  36. 36.21² =
  37. 37.21² =
  38. 38.11² =
  39. 39.22² =
  40. 40.28² =

Answer key

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

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