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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 955 · 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. 1.23² =
  2. 2.15² =
  3. 3.21² =
  4. 4.27² =
  5. 5.11² =
  6. 6.12² =
  7. 7.22² =
  8. 8.25² =
  9. 9.13² =
  10. 10.29² =
  11. 11.26² =
  12. 12.16² =
  13. 13.17² =
  14. 14.28² =
  15. 15.14² =
  16. 16.19² =
  17. 17.13² =
  18. 18.24² =
  19. 19.27² =
  20. 20.22² =
  21. 21.18² =
  22. 22.12² =
  23. 23.27² =
  24. 24.16² =
  25. 25.14² =
  26. 26.18² =
  27. 27.23² =
  28. 28.28² =
  29. 29.17² =
  30. 30.12² =
  31. 31.28² =
  32. 32.19² =
  33. 33.23² =
  34. 34.16² =
  35. 35.18² =
  36. 36.16² =
  37. 37.21² =
  38. 38.24² =
  39. 39.27² =
  40. 40.13² =

Answer key

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

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