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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 944 · 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. 2.21² =
  3. 3.24² =
  4. 4.13² =
  5. 5.18² =
  6. 6.15² =
  7. 7.29² =
  8. 8.19² =
  9. 9.16² =
  10. 10.26² =
  11. 11.27² =
  12. 12.14² =
  13. 13.12² =
  14. 14.17² =
  15. 15.28² =
  16. 16.25² =
  17. 17.22² =
  18. 18.11² =
  19. 19.29² =
  20. 20.24² =
  21. 21.19² =
  22. 22.18² =
  23. 23.28² =
  24. 24.23² =
  25. 25.29² =
  26. 26.29² =
  27. 27.22² =
  28. 28.22² =
  29. 29.23² =
  30. 30.12² =
  31. 31.13² =
  32. 32.29² =
  33. 33.25² =
  34. 34.28² =
  35. 35.11² =
  36. 36.18² =
  37. 37.16² =
  38. 38.13² =
  39. 39.27² =
  40. 40.19² =

Answer key

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

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