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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 351 · 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. 1.4 + ? = 10
  2. 2.8 + ? = 10
  3. 3.89 + ? = 100
  4. 4.87 + ? = 100
  5. 5.61 + ? = 100
  6. 6.68 + ? = 100
  7. 7.6 + ? = 10
  8. 8.33 + ? = 100
  9. 9.7 + ? = 10
  10. 10.1 + ? = 10
  11. 11.60 + ? = 100
  12. 12.74 + ? = 100
  13. 13.9 + ? = 10
  14. 14.20 + ? = 100
  15. 15.63 + ? = 100
  16. 16.29 + ? = 100
  17. 17.36 + ? = 100
  18. 18.42 + ? = 100
  19. 19.48 + ? = 100
  20. 20.73 + ? = 100
  21. 21.67 + ? = 100
  22. 22.16 + ? = 100
  23. 23.23 + ? = 100
  24. 24.85 + ? = 100
  25. 25.34 + ? = 100
  26. 26.88 + ? = 100
  27. 27.50 + ? = 100
  28. 28.2 + ? = 10
  29. 29.12 + ? = 100
  30. 30.69 + ? = 100
  31. 31.15 + ? = 100
  32. 32.52 + ? = 100
  33. 33.5 + ? = 10
  34. 34.3 + ? = 10
  35. 35.51 + ? = 100
  36. 36.14 + ? = 100
  37. 37.49 + ? = 100
  38. 38.28 + ? = 100
  39. 39.82 + ? = 100
  40. 40.45 + ? = 100

Answer key

  1. 6
  2. 2
  3. 11
  4. 13
  5. 39
  6. 32
  7. 4
  8. 67
  9. 3
  10. 9
  11. 40
  12. 26
  13. 1
  14. 80
  15. 37
  16. 71
  17. 64
  18. 58
  19. 52
  20. 27
  21. 33
  22. 84
  23. 77
  24. 15
  25. 66
  26. 12
  27. 50
  28. 8
  29. 88
  30. 31
  31. 85
  32. 48
  33. 5
  34. 7
  35. 49
  36. 86
  37. 51
  38. 72
  39. 18
  40. 55

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