← 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 890 · 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. 1.50 + ? = 100
  2. 2.3 + ? = 10
  3. 3.6 + ? = 10
  4. 4.55 + ? = 100
  5. 5.7 + ? = 10
  6. 6.5 + ? = 10
  7. 7.22 + ? = 100
  8. 8.4 + ? = 10
  9. 9.1 + ? = 10
  10. 10.18 + ? = 100
  11. 11.73 + ? = 100
  12. 12.39 + ? = 100
  13. 13.52 + ? = 100
  14. 14.70 + ? = 100
  15. 15.21 + ? = 100
  16. 16.42 + ? = 100
  17. 17.85 + ? = 100
  18. 18.63 + ? = 100
  19. 19.59 + ? = 100
  20. 20.61 + ? = 100
  21. 21.27 + ? = 100
  22. 22.8 + ? = 10
  23. 23.11 + ? = 100
  24. 24.83 + ? = 100
  25. 25.32 + ? = 100
  26. 26.62 + ? = 100
  27. 27.86 + ? = 100
  28. 28.67 + ? = 100
  29. 29.2 + ? = 10
  30. 30.81 + ? = 100
  31. 31.68 + ? = 100
  32. 32.41 + ? = 100
  33. 33.53 + ? = 100
  34. 34.15 + ? = 100
  35. 35.40 + ? = 100
  36. 36.44 + ? = 100
  37. 37.9 + ? = 10
  38. 38.28 + ? = 100
  39. 39.20 + ? = 100
  40. 40.30 + ? = 100

Answer key

  1. 50
  2. 7
  3. 4
  4. 45
  5. 3
  6. 5
  7. 78
  8. 6
  9. 9
  10. 82
  11. 27
  12. 61
  13. 48
  14. 30
  15. 79
  16. 58
  17. 15
  18. 37
  19. 41
  20. 39
  21. 73
  22. 2
  23. 89
  24. 17
  25. 68
  26. 38
  27. 14
  28. 33
  29. 8
  30. 19
  31. 32
  32. 59
  33. 47
  34. 85
  35. 60
  36. 56
  37. 1
  38. 72
  39. 80
  40. 70

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