← Number bonds to 10 and 100 lesson New set →

Number Bonds Worksheet (to 10 and 100)

Mental maths lesson 1: Number bonds to 10 and 100 · Set 743 · 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. 1.74 + ? = 100
  2. 2.1 + ? = 10
  3. 3.42 + ? = 100
  4. 4.30 + ? = 100
  5. 5.6 + ? = 10
  6. 6.7 + ? = 10
  7. 7.8 + ? = 10
  8. 8.36 + ? = 100
  9. 9.31 + ? = 100
  10. 10.3 + ? = 10
  11. 11.86 + ? = 100
  12. 12.5 + ? = 10
  13. 13.4 + ? = 10
  14. 14.69 + ? = 100
  15. 15.19 + ? = 100
  16. 16.82 + ? = 100
  17. 17.20 + ? = 100
  18. 18.39 + ? = 100
  19. 19.9 + ? = 10
  20. 20.28 + ? = 100
  21. 21.2 + ? = 10
  22. 22.66 + ? = 100
  23. 23.84 + ? = 100
  24. 24.13 + ? = 100
  25. 25.55 + ? = 100
  26. 26.25 + ? = 100
  27. 27.32 + ? = 100
  28. 28.22 + ? = 100
  29. 29.72 + ? = 100
  30. 30.12 + ? = 100
  31. 31.16 + ? = 100
  32. 32.45 + ? = 100
  33. 33.59 + ? = 100
  34. 34.77 + ? = 100
  35. 35.81 + ? = 100
  36. 36.14 + ? = 100
  37. 37.33 + ? = 100
  38. 38.58 + ? = 100
  39. 39.79 + ? = 100
  40. 40.26 + ? = 100

Answer key

  1. 26
  2. 9
  3. 58
  4. 70
  5. 4
  6. 3
  7. 2
  8. 64
  9. 69
  10. 7
  11. 14
  12. 5
  13. 6
  14. 31
  15. 81
  16. 18
  17. 80
  18. 61
  19. 1
  20. 72
  21. 8
  22. 34
  23. 16
  24. 87
  25. 45
  26. 75
  27. 68
  28. 78
  29. 28
  30. 88
  31. 84
  32. 55
  33. 41
  34. 23
  35. 19
  36. 86
  37. 67
  38. 42
  39. 21
  40. 74

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths