← 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 418 · 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. 1.14 + ? = 100
  2. 2.89 + ? = 100
  3. 3.12 + ? = 100
  4. 4.20 + ? = 100
  5. 5.59 + ? = 100
  6. 6.88 + ? = 100
  7. 7.5 + ? = 10
  8. 8.7 + ? = 10
  9. 9.67 + ? = 100
  10. 10.3 + ? = 10
  11. 11.4 + ? = 10
  12. 12.56 + ? = 100
  13. 13.6 + ? = 10
  14. 14.9 + ? = 10
  15. 15.72 + ? = 100
  16. 16.49 + ? = 100
  17. 17.43 + ? = 100
  18. 18.11 + ? = 100
  19. 19.68 + ? = 100
  20. 20.83 + ? = 100
  21. 21.36 + ? = 100
  22. 22.77 + ? = 100
  23. 23.65 + ? = 100
  24. 24.13 + ? = 100
  25. 25.2 + ? = 10
  26. 26.34 + ? = 100
  27. 27.51 + ? = 100
  28. 28.1 + ? = 10
  29. 29.80 + ? = 100
  30. 30.26 + ? = 100
  31. 31.58 + ? = 100
  32. 32.81 + ? = 100
  33. 33.8 + ? = 10
  34. 34.78 + ? = 100
  35. 35.52 + ? = 100
  36. 36.79 + ? = 100
  37. 37.50 + ? = 100
  38. 38.87 + ? = 100
  39. 39.82 + ? = 100
  40. 40.76 + ? = 100

Answer key

  1. 86
  2. 11
  3. 88
  4. 80
  5. 41
  6. 12
  7. 5
  8. 3
  9. 33
  10. 7
  11. 6
  12. 44
  13. 4
  14. 1
  15. 28
  16. 51
  17. 57
  18. 89
  19. 32
  20. 17
  21. 64
  22. 23
  23. 35
  24. 87
  25. 8
  26. 66
  27. 49
  28. 9
  29. 20
  30. 74
  31. 42
  32. 19
  33. 2
  34. 22
  35. 48
  36. 21
  37. 50
  38. 13
  39. 18
  40. 24

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