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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 420 · 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. 1.54 + ? = 100
  2. 2.9 + ? = 10
  3. 3.89 + ? = 100
  4. 4.3 + ? = 10
  5. 5.13 + ? = 100
  6. 6.8 + ? = 10
  7. 7.7 + ? = 10
  8. 8.67 + ? = 100
  9. 9.4 + ? = 10
  10. 10.43 + ? = 100
  11. 11.6 + ? = 10
  12. 12.33 + ? = 100
  13. 13.58 + ? = 100
  14. 14.56 + ? = 100
  15. 15.61 + ? = 100
  16. 16.69 + ? = 100
  17. 17.52 + ? = 100
  18. 18.1 + ? = 10
  19. 19.72 + ? = 100
  20. 20.62 + ? = 100
  21. 21.84 + ? = 100
  22. 22.16 + ? = 100
  23. 23.26 + ? = 100
  24. 24.29 + ? = 100
  25. 25.77 + ? = 100
  26. 26.2 + ? = 10
  27. 27.63 + ? = 100
  28. 28.68 + ? = 100
  29. 29.76 + ? = 100
  30. 30.86 + ? = 100
  31. 31.59 + ? = 100
  32. 32.34 + ? = 100
  33. 33.49 + ? = 100
  34. 34.32 + ? = 100
  35. 35.36 + ? = 100
  36. 36.87 + ? = 100
  37. 37.12 + ? = 100
  38. 38.19 + ? = 100
  39. 39.55 + ? = 100
  40. 40.22 + ? = 100

Answer key

  1. 46
  2. 1
  3. 11
  4. 7
  5. 87
  6. 2
  7. 3
  8. 33
  9. 6
  10. 57
  11. 4
  12. 67
  13. 42
  14. 44
  15. 39
  16. 31
  17. 48
  18. 9
  19. 28
  20. 38
  21. 16
  22. 84
  23. 74
  24. 71
  25. 23
  26. 8
  27. 37
  28. 32
  29. 24
  30. 14
  31. 41
  32. 66
  33. 51
  34. 68
  35. 64
  36. 13
  37. 88
  38. 81
  39. 45
  40. 78

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