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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 968 · 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. 1.28 + ? = 100
  2. 2.22 + ? = 100
  3. 3.4 + ? = 10
  4. 4.6 + ? = 10
  5. 5.35 + ? = 100
  6. 6.51 + ? = 100
  7. 7.27 + ? = 100
  8. 8.79 + ? = 100
  9. 9.16 + ? = 100
  10. 10.32 + ? = 100
  11. 11.62 + ? = 100
  12. 12.72 + ? = 100
  13. 13.80 + ? = 100
  14. 14.38 + ? = 100
  15. 15.55 + ? = 100
  16. 16.9 + ? = 10
  17. 17.8 + ? = 10
  18. 18.12 + ? = 100
  19. 19.89 + ? = 100
  20. 20.34 + ? = 100
  21. 21.46 + ? = 100
  22. 22.77 + ? = 100
  23. 23.52 + ? = 100
  24. 24.2 + ? = 10
  25. 25.48 + ? = 100
  26. 26.69 + ? = 100
  27. 27.1 + ? = 10
  28. 28.15 + ? = 100
  29. 29.54 + ? = 100
  30. 30.84 + ? = 100
  31. 31.66 + ? = 100
  32. 32.7 + ? = 10
  33. 33.23 + ? = 100
  34. 34.57 + ? = 100
  35. 35.78 + ? = 100
  36. 36.3 + ? = 10
  37. 37.74 + ? = 100
  38. 38.5 + ? = 10
  39. 39.11 + ? = 100
  40. 40.37 + ? = 100

Answer key

  1. 72
  2. 78
  3. 6
  4. 4
  5. 65
  6. 49
  7. 73
  8. 21
  9. 84
  10. 68
  11. 38
  12. 28
  13. 20
  14. 62
  15. 45
  16. 1
  17. 2
  18. 88
  19. 11
  20. 66
  21. 54
  22. 23
  23. 48
  24. 8
  25. 52
  26. 31
  27. 9
  28. 85
  29. 46
  30. 16
  31. 34
  32. 3
  33. 77
  34. 43
  35. 22
  36. 7
  37. 26
  38. 5
  39. 89
  40. 63

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