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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 612 · 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. 2.2 + ? = 10
  3. 3.81 + ? = 100
  4. 4.4 + ? = 10
  5. 5.88 + ? = 100
  6. 6.1 + ? = 10
  7. 7.74 + ? = 100
  8. 8.48 + ? = 100
  9. 9.21 + ? = 100
  10. 10.9 + ? = 10
  11. 11.7 + ? = 10
  12. 12.55 + ? = 100
  13. 13.8 + ? = 10
  14. 14.77 + ? = 100
  15. 15.18 + ? = 100
  16. 16.5 + ? = 10
  17. 17.65 + ? = 100
  18. 18.22 + ? = 100
  19. 19.42 + ? = 100
  20. 20.70 + ? = 100
  21. 21.67 + ? = 100
  22. 22.28 + ? = 100
  23. 23.63 + ? = 100
  24. 24.47 + ? = 100
  25. 25.78 + ? = 100
  26. 26.76 + ? = 100
  27. 27.16 + ? = 100
  28. 28.37 + ? = 100
  29. 29.60 + ? = 100
  30. 30.12 + ? = 100
  31. 31.57 + ? = 100
  32. 32.6 + ? = 10
  33. 33.71 + ? = 100
  34. 34.27 + ? = 100
  35. 35.54 + ? = 100
  36. 36.49 + ? = 100
  37. 37.51 + ? = 100
  38. 38.45 + ? = 100
  39. 39.19 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 7
  2. 8
  3. 19
  4. 6
  5. 12
  6. 9
  7. 26
  8. 52
  9. 79
  10. 1
  11. 3
  12. 45
  13. 2
  14. 23
  15. 82
  16. 5
  17. 35
  18. 78
  19. 58
  20. 30
  21. 33
  22. 72
  23. 37
  24. 53
  25. 22
  26. 24
  27. 84
  28. 63
  29. 40
  30. 88
  31. 43
  32. 4
  33. 29
  34. 73
  35. 46
  36. 51
  37. 49
  38. 55
  39. 81
  40. 16

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