← 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 909 · 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. 1.58 + ? = 100
  2. 2.7 + ? = 10
  3. 3.9 + ? = 10
  4. 4.71 + ? = 100
  5. 5.6 + ? = 10
  6. 6.1 + ? = 10
  7. 7.29 + ? = 100
  8. 8.36 + ? = 100
  9. 9.2 + ? = 10
  10. 10.16 + ? = 100
  11. 11.4 + ? = 10
  12. 12.43 + ? = 100
  13. 13.53 + ? = 100
  14. 14.85 + ? = 100
  15. 15.28 + ? = 100
  16. 16.12 + ? = 100
  17. 17.84 + ? = 100
  18. 18.15 + ? = 100
  19. 19.33 + ? = 100
  20. 20.48 + ? = 100
  21. 21.89 + ? = 100
  22. 22.8 + ? = 10
  23. 23.42 + ? = 100
  24. 24.77 + ? = 100
  25. 25.22 + ? = 100
  26. 26.11 + ? = 100
  27. 27.14 + ? = 100
  28. 28.61 + ? = 100
  29. 29.25 + ? = 100
  30. 30.5 + ? = 10
  31. 31.79 + ? = 100
  32. 32.26 + ? = 100
  33. 33.49 + ? = 100
  34. 34.74 + ? = 100
  35. 35.3 + ? = 10
  36. 36.47 + ? = 100
  37. 37.57 + ? = 100
  38. 38.60 + ? = 100
  39. 39.52 + ? = 100
  40. 40.27 + ? = 100

Answer key

  1. 42
  2. 3
  3. 1
  4. 29
  5. 4
  6. 9
  7. 71
  8. 64
  9. 8
  10. 84
  11. 6
  12. 57
  13. 47
  14. 15
  15. 72
  16. 88
  17. 16
  18. 85
  19. 67
  20. 52
  21. 11
  22. 2
  23. 58
  24. 23
  25. 78
  26. 89
  27. 86
  28. 39
  29. 75
  30. 5
  31. 21
  32. 74
  33. 51
  34. 26
  35. 7
  36. 53
  37. 43
  38. 40
  39. 48
  40. 73

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