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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 969 · 40 questions
TalentJR

How to do it in your head (Make 10): Bonds to 10: 1 + 9, 2 + 8, 3 + 7, 4 + 6, 5 + 5. Bonds to 100: the ones make 10, and the tens make 9 (because the ones already gave one ten). If the number ends in 0, the tens make 10: 40 + 60 = 100.

NameDateTime takenScore ___ / 40
  1. 1.31 + ? = 100
  2. 2.2 + ? = 10
  3. 3.42 + ? = 100
  4. 4.67 + ? = 100
  5. 5.1 + ? = 10
  6. 6.19 + ? = 100
  7. 7.18 + ? = 100
  8. 8.33 + ? = 100
  9. 9.49 + ? = 100
  10. 10.8 + ? = 10
  11. 11.21 + ? = 100
  12. 12.62 + ? = 100
  13. 13.58 + ? = 100
  14. 14.41 + ? = 100
  15. 15.79 + ? = 100
  16. 16.7 + ? = 10
  17. 17.23 + ? = 100
  18. 18.72 + ? = 100
  19. 19.9 + ? = 10
  20. 20.68 + ? = 100
  21. 21.4 + ? = 10
  22. 22.6 + ? = 10
  23. 23.20 + ? = 100
  24. 24.71 + ? = 100
  25. 25.37 + ? = 100
  26. 26.3 + ? = 10
  27. 27.24 + ? = 100
  28. 28.16 + ? = 100
  29. 29.53 + ? = 100
  30. 30.55 + ? = 100
  31. 31.5 + ? = 10
  32. 32.26 + ? = 100
  33. 33.44 + ? = 100
  34. 34.80 + ? = 100
  35. 35.27 + ? = 100
  36. 36.11 + ? = 100
  37. 37.57 + ? = 100
  38. 38.64 + ? = 100
  39. 39.29 + ? = 100
  40. 40.59 + ? = 100

Answer key

  1. 69
  2. 8
  3. 58
  4. 33
  5. 9
  6. 81
  7. 82
  8. 67
  9. 51
  10. 2
  11. 79
  12. 38
  13. 42
  14. 59
  15. 21
  16. 3
  17. 77
  18. 28
  19. 1
  20. 32
  21. 6
  22. 4
  23. 80
  24. 29
  25. 63
  26. 7
  27. 76
  28. 84
  29. 47
  30. 45
  31. 5
  32. 74
  33. 56
  34. 20
  35. 73
  36. 89
  37. 43
  38. 36
  39. 71
  40. 41

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