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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 861 · 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. 1.4 + ? = 10
  2. 2.2 + ? = 10
  3. 3.75 + ? = 100
  4. 4.67 + ? = 100
  5. 5.1 + ? = 10
  6. 6.53 + ? = 100
  7. 7.51 + ? = 100
  8. 8.68 + ? = 100
  9. 9.29 + ? = 100
  10. 10.7 + ? = 10
  11. 11.3 + ? = 10
  12. 12.47 + ? = 100
  13. 13.55 + ? = 100
  14. 14.6 + ? = 10
  15. 15.5 + ? = 10
  16. 16.56 + ? = 100
  17. 17.18 + ? = 100
  18. 18.14 + ? = 100
  19. 19.63 + ? = 100
  20. 20.25 + ? = 100
  21. 21.69 + ? = 100
  22. 22.12 + ? = 100
  23. 23.81 + ? = 100
  24. 24.26 + ? = 100
  25. 25.8 + ? = 10
  26. 26.50 + ? = 100
  27. 27.48 + ? = 100
  28. 28.80 + ? = 100
  29. 29.15 + ? = 100
  30. 30.61 + ? = 100
  31. 31.36 + ? = 100
  32. 32.76 + ? = 100
  33. 33.72 + ? = 100
  34. 34.24 + ? = 100
  35. 35.85 + ? = 100
  36. 36.77 + ? = 100
  37. 37.11 + ? = 100
  38. 38.32 + ? = 100
  39. 39.16 + ? = 100
  40. 40.27 + ? = 100

Answer key

  1. 6
  2. 8
  3. 25
  4. 33
  5. 9
  6. 47
  7. 49
  8. 32
  9. 71
  10. 3
  11. 7
  12. 53
  13. 45
  14. 4
  15. 5
  16. 44
  17. 82
  18. 86
  19. 37
  20. 75
  21. 31
  22. 88
  23. 19
  24. 74
  25. 2
  26. 50
  27. 52
  28. 20
  29. 85
  30. 39
  31. 64
  32. 24
  33. 28
  34. 76
  35. 15
  36. 23
  37. 89
  38. 68
  39. 84
  40. 73

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