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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 799 · 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. 1.2 + ? = 10
  2. 2.74 + ? = 100
  3. 3.70 + ? = 100
  4. 4.14 + ? = 100
  5. 5.6 + ? = 10
  6. 6.1 + ? = 10
  7. 7.3 + ? = 10
  8. 8.36 + ? = 100
  9. 9.85 + ? = 100
  10. 10.80 + ? = 100
  11. 11.81 + ? = 100
  12. 12.9 + ? = 10
  13. 13.55 + ? = 100
  14. 14.8 + ? = 10
  15. 15.26 + ? = 100
  16. 16.72 + ? = 100
  17. 17.76 + ? = 100
  18. 18.19 + ? = 100
  19. 19.5 + ? = 10
  20. 20.78 + ? = 100
  21. 21.20 + ? = 100
  22. 22.64 + ? = 100
  23. 23.4 + ? = 10
  24. 24.30 + ? = 100
  25. 25.7 + ? = 10
  26. 26.53 + ? = 100
  27. 27.45 + ? = 100
  28. 28.63 + ? = 100
  29. 29.21 + ? = 100
  30. 30.83 + ? = 100
  31. 31.79 + ? = 100
  32. 32.28 + ? = 100
  33. 33.34 + ? = 100
  34. 34.29 + ? = 100
  35. 35.71 + ? = 100
  36. 36.18 + ? = 100
  37. 37.67 + ? = 100
  38. 38.52 + ? = 100
  39. 39.15 + ? = 100
  40. 40.44 + ? = 100

Answer key

  1. 8
  2. 26
  3. 30
  4. 86
  5. 4
  6. 9
  7. 7
  8. 64
  9. 15
  10. 20
  11. 19
  12. 1
  13. 45
  14. 2
  15. 74
  16. 28
  17. 24
  18. 81
  19. 5
  20. 22
  21. 80
  22. 36
  23. 6
  24. 70
  25. 3
  26. 47
  27. 55
  28. 37
  29. 79
  30. 17
  31. 21
  32. 72
  33. 66
  34. 71
  35. 29
  36. 82
  37. 33
  38. 48
  39. 85
  40. 56

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