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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 608 · 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. 1.52 + ? = 100
  2. 2.58 + ? = 100
  3. 3.2 + ? = 10
  4. 4.1 + ? = 10
  5. 5.14 + ? = 100
  6. 6.6 + ? = 10
  7. 7.16 + ? = 100
  8. 8.38 + ? = 100
  9. 9.8 + ? = 10
  10. 10.19 + ? = 100
  11. 11.36 + ? = 100
  12. 12.5 + ? = 10
  13. 13.9 + ? = 10
  14. 14.4 + ? = 10
  15. 15.7 + ? = 10
  16. 16.18 + ? = 100
  17. 17.45 + ? = 100
  18. 18.81 + ? = 100
  19. 19.62 + ? = 100
  20. 20.30 + ? = 100
  21. 21.3 + ? = 10
  22. 22.78 + ? = 100
  23. 23.43 + ? = 100
  24. 24.83 + ? = 100
  25. 25.55 + ? = 100
  26. 26.46 + ? = 100
  27. 27.88 + ? = 100
  28. 28.49 + ? = 100
  29. 29.48 + ? = 100
  30. 30.86 + ? = 100
  31. 31.23 + ? = 100
  32. 32.68 + ? = 100
  33. 33.69 + ? = 100
  34. 34.29 + ? = 100
  35. 35.63 + ? = 100
  36. 36.84 + ? = 100
  37. 37.80 + ? = 100
  38. 38.28 + ? = 100
  39. 39.41 + ? = 100
  40. 40.33 + ? = 100

Answer key

  1. 48
  2. 42
  3. 8
  4. 9
  5. 86
  6. 4
  7. 84
  8. 62
  9. 2
  10. 81
  11. 64
  12. 5
  13. 1
  14. 6
  15. 3
  16. 82
  17. 55
  18. 19
  19. 38
  20. 70
  21. 7
  22. 22
  23. 57
  24. 17
  25. 45
  26. 54
  27. 12
  28. 51
  29. 52
  30. 14
  31. 77
  32. 32
  33. 31
  34. 71
  35. 37
  36. 16
  37. 20
  38. 72
  39. 59
  40. 67

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