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Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 754 · 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. 1.1 + ? = 10
  2. 2.5 + ? = 10
  3. 3.2 + ? = 10
  4. 4.3 + ? = 10
  5. 5.82 + ? = 100
  6. 6.79 + ? = 100
  7. 7.8 + ? = 10
  8. 8.4 + ? = 10
  9. 9.61 + ? = 100
  10. 10.9 + ? = 10
  11. 11.65 + ? = 100
  12. 12.30 + ? = 100
  13. 13.50 + ? = 100
  14. 14.44 + ? = 100
  15. 15.7 + ? = 10
  16. 16.37 + ? = 100
  17. 17.85 + ? = 100
  18. 18.49 + ? = 100
  19. 19.51 + ? = 100
  20. 20.12 + ? = 100
  21. 21.11 + ? = 100
  22. 22.6 + ? = 10
  23. 23.48 + ? = 100
  24. 24.67 + ? = 100
  25. 25.45 + ? = 100
  26. 26.29 + ? = 100
  27. 27.41 + ? = 100
  28. 28.17 + ? = 100
  29. 29.14 + ? = 100
  30. 30.71 + ? = 100
  31. 31.53 + ? = 100
  32. 32.74 + ? = 100
  33. 33.40 + ? = 100
  34. 34.33 + ? = 100
  35. 35.22 + ? = 100
  36. 36.21 + ? = 100
  37. 37.64 + ? = 100
  38. 38.27 + ? = 100
  39. 39.62 + ? = 100
  40. 40.69 + ? = 100

Answer key

  1. 9
  2. 5
  3. 8
  4. 7
  5. 18
  6. 21
  7. 2
  8. 6
  9. 39
  10. 1
  11. 35
  12. 70
  13. 50
  14. 56
  15. 3
  16. 63
  17. 15
  18. 51
  19. 49
  20. 88
  21. 89
  22. 4
  23. 52
  24. 33
  25. 55
  26. 71
  27. 59
  28. 83
  29. 86
  30. 29
  31. 47
  32. 26
  33. 60
  34. 67
  35. 78
  36. 79
  37. 36
  38. 73
  39. 38
  40. 31

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