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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 970 · 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. 2.22² =
  3. 3.28² =
  4. 4.13² =
  5. 5.17² =
  6. 6.25² =
  7. 7.21² =
  8. 8.19² =
  9. 9.11² =
  10. 10.24² =
  11. 11.29² =
  12. 12.27² =
  13. 13.15² =
  14. 14.18² =
  15. 15.12² =
  16. 16.14² =
  17. 17.23² =
  18. 18.27² =
  19. 19.11² =
  20. 20.26² =
  21. 21.18² =
  22. 22.12² =
  23. 23.19² =
  24. 24.24² =
  25. 25.16² =
  26. 26.21² =
  27. 27.18² =
  28. 28.14² =
  29. 29.27² =
  30. 30.15² =
  31. 31.24² =
  32. 32.25² =
  33. 33.13² =
  34. 34.11² =
  35. 35.14² =
  36. 36.11² =
  37. 37.27² =
  38. 38.27² =
  39. 39.24² =
  40. 40.14² =

Answer key

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

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