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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 346 · 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. 1.11 + ? = 100
  2. 2.4 + ? = 10
  3. 3.5 + ? = 10
  4. 4.51 + ? = 100
  5. 5.52 + ? = 100
  6. 6.19 + ? = 100
  7. 7.43 + ? = 100
  8. 8.27 + ? = 100
  9. 9.7 + ? = 10
  10. 10.78 + ? = 100
  11. 11.76 + ? = 100
  12. 12.89 + ? = 100
  13. 13.87 + ? = 100
  14. 14.9 + ? = 10
  15. 15.56 + ? = 100
  16. 16.1 + ? = 10
  17. 17.53 + ? = 100
  18. 18.3 + ? = 10
  19. 19.2 + ? = 10
  20. 20.23 + ? = 100
  21. 21.58 + ? = 100
  22. 22.66 + ? = 100
  23. 23.36 + ? = 100
  24. 24.25 + ? = 100
  25. 25.8 + ? = 10
  26. 26.37 + ? = 100
  27. 27.86 + ? = 100
  28. 28.47 + ? = 100
  29. 29.34 + ? = 100
  30. 30.49 + ? = 100
  31. 31.16 + ? = 100
  32. 32.68 + ? = 100
  33. 33.70 + ? = 100
  34. 34.67 + ? = 100
  35. 35.6 + ? = 10
  36. 36.26 + ? = 100
  37. 37.30 + ? = 100
  38. 38.32 + ? = 100
  39. 39.50 + ? = 100
  40. 40.45 + ? = 100

Answer key

  1. 89
  2. 6
  3. 5
  4. 49
  5. 48
  6. 81
  7. 57
  8. 73
  9. 3
  10. 22
  11. 24
  12. 11
  13. 13
  14. 1
  15. 44
  16. 9
  17. 47
  18. 7
  19. 8
  20. 77
  21. 42
  22. 34
  23. 64
  24. 75
  25. 2
  26. 63
  27. 14
  28. 53
  29. 66
  30. 51
  31. 84
  32. 32
  33. 30
  34. 33
  35. 4
  36. 74
  37. 70
  38. 68
  39. 50
  40. 55

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