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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 932 · 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. 1.24² =
  2. 2.15² =
  3. 3.23² =
  4. 4.14² =
  5. 5.19² =
  6. 6.11² =
  7. 7.22² =
  8. 8.27² =
  9. 9.13² =
  10. 10.21² =
  11. 11.29² =
  12. 12.18² =
  13. 13.17² =
  14. 14.28² =
  15. 15.25² =
  16. 16.19² =
  17. 17.12² =
  18. 18.26² =
  19. 19.28² =
  20. 20.16² =
  21. 21.18² =
  22. 22.26² =
  23. 23.29² =
  24. 24.11² =
  25. 25.17² =
  26. 26.18² =
  27. 27.17² =
  28. 28.24² =
  29. 29.29² =
  30. 30.19² =
  31. 31.15² =
  32. 32.22² =
  33. 33.19² =
  34. 34.14² =
  35. 35.15² =
  36. 36.21² =
  37. 37.13² =
  38. 38.22² =
  39. 39.18² =
  40. 40.28² =

Answer key

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

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