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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 536 · 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. 1.81 + ? = 100
  2. 2.1 + ? = 10
  3. 3.16 + ? = 100
  4. 4.12 + ? = 100
  5. 5.14 + ? = 100
  6. 6.4 + ? = 10
  7. 7.5 + ? = 10
  8. 8.2 + ? = 10
  9. 9.22 + ? = 100
  10. 10.68 + ? = 100
  11. 11.24 + ? = 100
  12. 12.75 + ? = 100
  13. 13.23 + ? = 100
  14. 14.88 + ? = 100
  15. 15.9 + ? = 10
  16. 16.29 + ? = 100
  17. 17.18 + ? = 100
  18. 18.7 + ? = 10
  19. 19.67 + ? = 100
  20. 20.8 + ? = 10
  21. 21.63 + ? = 100
  22. 22.77 + ? = 100
  23. 23.80 + ? = 100
  24. 24.46 + ? = 100
  25. 25.84 + ? = 100
  26. 26.19 + ? = 100
  27. 27.69 + ? = 100
  28. 28.76 + ? = 100
  29. 29.3 + ? = 10
  30. 30.21 + ? = 100
  31. 31.28 + ? = 100
  32. 32.11 + ? = 100
  33. 33.6 + ? = 10
  34. 34.85 + ? = 100
  35. 35.32 + ? = 100
  36. 36.49 + ? = 100
  37. 37.52 + ? = 100
  38. 38.40 + ? = 100
  39. 39.64 + ? = 100
  40. 40.53 + ? = 100

Answer key

  1. 19
  2. 9
  3. 84
  4. 88
  5. 86
  6. 6
  7. 5
  8. 8
  9. 78
  10. 32
  11. 76
  12. 25
  13. 77
  14. 12
  15. 1
  16. 71
  17. 82
  18. 3
  19. 33
  20. 2
  21. 37
  22. 23
  23. 20
  24. 54
  25. 16
  26. 81
  27. 31
  28. 24
  29. 7
  30. 79
  31. 72
  32. 89
  33. 4
  34. 15
  35. 68
  36. 51
  37. 48
  38. 60
  39. 36
  40. 47

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