← 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 195 · 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. 1.9 + ? = 10
  2. 2.7 + ? = 10
  3. 3.66 + ? = 100
  4. 4.8 + ? = 10
  5. 5.70 + ? = 100
  6. 6.85 + ? = 100
  7. 7.31 + ? = 100
  8. 8.1 + ? = 10
  9. 9.81 + ? = 100
  10. 10.42 + ? = 100
  11. 11.16 + ? = 100
  12. 12.24 + ? = 100
  13. 13.5 + ? = 10
  14. 14.3 + ? = 10
  15. 15.65 + ? = 100
  16. 16.2 + ? = 10
  17. 17.41 + ? = 100
  18. 18.53 + ? = 100
  19. 19.56 + ? = 100
  20. 20.57 + ? = 100
  21. 21.13 + ? = 100
  22. 22.4 + ? = 10
  23. 23.33 + ? = 100
  24. 24.32 + ? = 100
  25. 25.23 + ? = 100
  26. 26.35 + ? = 100
  27. 27.74 + ? = 100
  28. 28.11 + ? = 100
  29. 29.48 + ? = 100
  30. 30.59 + ? = 100
  31. 31.46 + ? = 100
  32. 32.80 + ? = 100
  33. 33.67 + ? = 100
  34. 34.83 + ? = 100
  35. 35.38 + ? = 100
  36. 36.15 + ? = 100
  37. 37.6 + ? = 10
  38. 38.20 + ? = 100
  39. 39.29 + ? = 100
  40. 40.58 + ? = 100

Answer key

  1. 1
  2. 3
  3. 34
  4. 2
  5. 30
  6. 15
  7. 69
  8. 9
  9. 19
  10. 58
  11. 84
  12. 76
  13. 5
  14. 7
  15. 35
  16. 8
  17. 59
  18. 47
  19. 44
  20. 43
  21. 87
  22. 6
  23. 67
  24. 68
  25. 77
  26. 65
  27. 26
  28. 89
  29. 52
  30. 41
  31. 54
  32. 20
  33. 33
  34. 17
  35. 62
  36. 85
  37. 4
  38. 80
  39. 71
  40. 42

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