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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 981 · 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. 1.3 + ? = 10
  2. 2.47 + ? = 100
  3. 3.9 + ? = 10
  4. 4.24 + ? = 100
  5. 5.58 + ? = 100
  6. 6.38 + ? = 100
  7. 7.2 + ? = 10
  8. 8.6 + ? = 10
  9. 9.11 + ? = 100
  10. 10.68 + ? = 100
  11. 11.76 + ? = 100
  12. 12.31 + ? = 100
  13. 13.67 + ? = 100
  14. 14.7 + ? = 10
  15. 15.35 + ? = 100
  16. 16.17 + ? = 100
  17. 17.1 + ? = 10
  18. 18.53 + ? = 100
  19. 19.55 + ? = 100
  20. 20.86 + ? = 100
  21. 21.74 + ? = 100
  22. 22.8 + ? = 10
  23. 23.19 + ? = 100
  24. 24.63 + ? = 100
  25. 25.4 + ? = 10
  26. 26.22 + ? = 100
  27. 27.72 + ? = 100
  28. 28.41 + ? = 100
  29. 29.5 + ? = 10
  30. 30.37 + ? = 100
  31. 31.13 + ? = 100
  32. 32.69 + ? = 100
  33. 33.28 + ? = 100
  34. 34.78 + ? = 100
  35. 35.34 + ? = 100
  36. 36.51 + ? = 100
  37. 37.71 + ? = 100
  38. 38.85 + ? = 100
  39. 39.87 + ? = 100
  40. 40.54 + ? = 100

Answer key

  1. 7
  2. 53
  3. 1
  4. 76
  5. 42
  6. 62
  7. 8
  8. 4
  9. 89
  10. 32
  11. 24
  12. 69
  13. 33
  14. 3
  15. 65
  16. 83
  17. 9
  18. 47
  19. 45
  20. 14
  21. 26
  22. 2
  23. 81
  24. 37
  25. 6
  26. 78
  27. 28
  28. 59
  29. 5
  30. 63
  31. 87
  32. 31
  33. 72
  34. 22
  35. 66
  36. 49
  37. 29
  38. 15
  39. 13
  40. 46

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