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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 993 · 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. 2.21² =
  3. 3.28² =
  4. 4.26² =
  5. 5.12² =
  6. 6.23² =
  7. 7.15² =
  8. 8.22² =
  9. 9.11² =
  10. 10.14² =
  11. 11.29² =
  12. 12.25² =
  13. 13.27² =
  14. 14.24² =
  15. 15.17² =
  16. 16.13² =
  17. 17.19² =
  18. 18.11² =
  19. 19.16² =
  20. 20.13² =
  21. 21.18² =
  22. 22.28² =
  23. 23.14² =
  24. 24.26² =
  25. 25.18² =
  26. 26.16² =
  27. 27.17² =
  28. 28.19² =
  29. 29.13² =
  30. 30.18² =
  31. 31.17² =
  32. 32.28² =
  33. 33.24² =
  34. 34.15² =
  35. 35.27² =
  36. 36.24² =
  37. 37.19² =
  38. 38.13² =
  39. 39.16² =
  40. 40.15² =

Answer key

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

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