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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 476 · 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. 1.2 + ? = 10
  2. 2.76 + ? = 100
  3. 3.66 + ? = 100
  4. 4.23 + ? = 100
  5. 5.31 + ? = 100
  6. 6.28 + ? = 100
  7. 7.72 + ? = 100
  8. 8.9 + ? = 10
  9. 9.15 + ? = 100
  10. 10.80 + ? = 100
  11. 11.6 + ? = 10
  12. 12.88 + ? = 100
  13. 13.8 + ? = 10
  14. 14.4 + ? = 10
  15. 15.5 + ? = 10
  16. 16.62 + ? = 100
  17. 17.7 + ? = 10
  18. 18.46 + ? = 100
  19. 19.3 + ? = 10
  20. 20.74 + ? = 100
  21. 21.53 + ? = 100
  22. 22.42 + ? = 100
  23. 23.77 + ? = 100
  24. 24.13 + ? = 100
  25. 25.12 + ? = 100
  26. 26.21 + ? = 100
  27. 27.68 + ? = 100
  28. 28.78 + ? = 100
  29. 29.64 + ? = 100
  30. 30.44 + ? = 100
  31. 31.1 + ? = 10
  32. 32.70 + ? = 100
  33. 33.22 + ? = 100
  34. 34.37 + ? = 100
  35. 35.50 + ? = 100
  36. 36.87 + ? = 100
  37. 37.30 + ? = 100
  38. 38.36 + ? = 100
  39. 39.29 + ? = 100
  40. 40.43 + ? = 100

Answer key

  1. 8
  2. 24
  3. 34
  4. 77
  5. 69
  6. 72
  7. 28
  8. 1
  9. 85
  10. 20
  11. 4
  12. 12
  13. 2
  14. 6
  15. 5
  16. 38
  17. 3
  18. 54
  19. 7
  20. 26
  21. 47
  22. 58
  23. 23
  24. 87
  25. 88
  26. 79
  27. 32
  28. 22
  29. 36
  30. 56
  31. 9
  32. 30
  33. 78
  34. 63
  35. 50
  36. 13
  37. 70
  38. 64
  39. 71
  40. 57

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