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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 929 · 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. 1.18² =
  2. 2.21² =
  3. 3.11² =
  4. 4.12² =
  5. 5.24² =
  6. 6.29² =
  7. 7.17² =
  8. 8.15² =
  9. 9.19² =
  10. 10.26² =
  11. 11.28² =
  12. 12.14² =
  13. 13.13² =
  14. 14.23² =
  15. 15.27² =
  16. 16.19² =
  17. 17.22² =
  18. 18.16² =
  19. 19.29² =
  20. 20.25² =
  21. 21.14² =
  22. 22.24² =
  23. 23.27² =
  24. 24.23² =
  25. 25.27² =
  26. 26.18² =
  27. 27.29² =
  28. 28.25² =
  29. 29.27² =
  30. 30.12² =
  31. 31.11² =
  32. 32.23² =
  33. 33.26² =
  34. 34.18² =
  35. 35.11² =
  36. 36.14² =
  37. 37.29² =
  38. 38.29² =
  39. 39.11² =
  40. 40.28² =

Answer key

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

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