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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 147 · 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. 1.3 + ? = 10
  2. 2.37 + ? = 100
  3. 3.76 + ? = 100
  4. 4.9 + ? = 10
  5. 5.5 + ? = 10
  6. 6.4 + ? = 10
  7. 7.15 + ? = 100
  8. 8.35 + ? = 100
  9. 9.7 + ? = 10
  10. 10.1 + ? = 10
  11. 11.78 + ? = 100
  12. 12.20 + ? = 100
  13. 13.68 + ? = 100
  14. 14.6 + ? = 10
  15. 15.2 + ? = 10
  16. 16.21 + ? = 100
  17. 17.82 + ? = 100
  18. 18.65 + ? = 100
  19. 19.33 + ? = 100
  20. 20.86 + ? = 100
  21. 21.8 + ? = 10
  22. 22.60 + ? = 100
  23. 23.13 + ? = 100
  24. 24.74 + ? = 100
  25. 25.34 + ? = 100
  26. 26.49 + ? = 100
  27. 27.57 + ? = 100
  28. 28.53 + ? = 100
  29. 29.46 + ? = 100
  30. 30.12 + ? = 100
  31. 31.41 + ? = 100
  32. 32.51 + ? = 100
  33. 33.38 + ? = 100
  34. 34.36 + ? = 100
  35. 35.80 + ? = 100
  36. 36.54 + ? = 100
  37. 37.84 + ? = 100
  38. 38.55 + ? = 100
  39. 39.88 + ? = 100
  40. 40.18 + ? = 100

Answer key

  1. 7
  2. 63
  3. 24
  4. 1
  5. 5
  6. 6
  7. 85
  8. 65
  9. 3
  10. 9
  11. 22
  12. 80
  13. 32
  14. 4
  15. 8
  16. 79
  17. 18
  18. 35
  19. 67
  20. 14
  21. 2
  22. 40
  23. 87
  24. 26
  25. 66
  26. 51
  27. 43
  28. 47
  29. 54
  30. 88
  31. 59
  32. 49
  33. 62
  34. 64
  35. 20
  36. 46
  37. 16
  38. 45
  39. 12
  40. 82

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