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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 952 · 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. 3.21² =
  4. 4.19² =
  5. 5.25² =
  6. 6.28² =
  7. 7.24² =
  8. 8.23² =
  9. 9.14² =
  10. 10.13² =
  11. 11.16² =
  12. 12.22² =
  13. 13.15² =
  14. 14.17² =
  15. 15.29² =
  16. 16.27² =
  17. 17.11² =
  18. 18.26² =
  19. 19.25² =
  20. 20.11² =
  21. 21.25² =
  22. 22.19² =
  23. 23.24² =
  24. 24.19² =
  25. 25.14² =
  26. 26.16² =
  27. 27.11² =
  28. 28.18² =
  29. 29.25² =
  30. 30.11² =
  31. 31.19² =
  32. 32.23² =
  33. 33.22² =
  34. 34.28² =
  35. 35.13² =
  36. 36.14² =
  37. 37.27² =
  38. 38.23² =
  39. 39.17² =
  40. 40.21² =

Answer key

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

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