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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 846 · 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. 1.7 + ? = 10
  2. 2.61 + ? = 100
  3. 3.40 + ? = 100
  4. 4.87 + ? = 100
  5. 5.9 + ? = 10
  6. 6.88 + ? = 100
  7. 7.8 + ? = 10
  8. 8.55 + ? = 100
  9. 9.6 + ? = 10
  10. 10.2 + ? = 10
  11. 11.1 + ? = 10
  12. 12.23 + ? = 100
  13. 13.62 + ? = 100
  14. 14.4 + ? = 10
  15. 15.51 + ? = 100
  16. 16.67 + ? = 100
  17. 17.22 + ? = 100
  18. 18.72 + ? = 100
  19. 19.34 + ? = 100
  20. 20.27 + ? = 100
  21. 21.11 + ? = 100
  22. 22.24 + ? = 100
  23. 23.30 + ? = 100
  24. 24.63 + ? = 100
  25. 25.85 + ? = 100
  26. 26.5 + ? = 10
  27. 27.59 + ? = 100
  28. 28.33 + ? = 100
  29. 29.3 + ? = 10
  30. 30.69 + ? = 100
  31. 31.78 + ? = 100
  32. 32.4 + ? = 10
  33. 33.65 + ? = 100
  34. 34.28 + ? = 100
  35. 35.53 + ? = 100
  36. 36.16 + ? = 100
  37. 37.77 + ? = 100
  38. 38.64 + ? = 100
  39. 39.47 + ? = 100
  40. 40.26 + ? = 100

Answer key

  1. 3
  2. 39
  3. 60
  4. 13
  5. 1
  6. 12
  7. 2
  8. 45
  9. 4
  10. 8
  11. 9
  12. 77
  13. 38
  14. 6
  15. 49
  16. 33
  17. 78
  18. 28
  19. 66
  20. 73
  21. 89
  22. 76
  23. 70
  24. 37
  25. 15
  26. 5
  27. 41
  28. 67
  29. 7
  30. 31
  31. 22
  32. 6
  33. 35
  34. 72
  35. 47
  36. 84
  37. 23
  38. 36
  39. 53
  40. 74

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