← 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 558 · 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. 1.5 + ? = 10
  2. 2.46 + ? = 100
  3. 3.19 + ? = 100
  4. 4.30 + ? = 100
  5. 5.54 + ? = 100
  6. 6.52 + ? = 100
  7. 7.3 + ? = 10
  8. 8.17 + ? = 100
  9. 9.31 + ? = 100
  10. 10.2 + ? = 10
  11. 11.42 + ? = 100
  12. 12.69 + ? = 100
  13. 13.79 + ? = 100
  14. 14.1 + ? = 10
  15. 15.86 + ? = 100
  16. 16.4 + ? = 10
  17. 17.40 + ? = 100
  18. 18.6 + ? = 10
  19. 19.38 + ? = 100
  20. 20.39 + ? = 100
  21. 21.34 + ? = 100
  22. 22.76 + ? = 100
  23. 23.62 + ? = 100
  24. 24.26 + ? = 100
  25. 25.8 + ? = 10
  26. 26.47 + ? = 100
  27. 27.87 + ? = 100
  28. 28.21 + ? = 100
  29. 29.9 + ? = 10
  30. 30.15 + ? = 100
  31. 31.57 + ? = 100
  32. 32.18 + ? = 100
  33. 33.60 + ? = 100
  34. 34.13 + ? = 100
  35. 35.14 + ? = 100
  36. 36.22 + ? = 100
  37. 37.61 + ? = 100
  38. 38.70 + ? = 100
  39. 39.64 + ? = 100
  40. 40.16 + ? = 100

Answer key

  1. 5
  2. 54
  3. 81
  4. 70
  5. 46
  6. 48
  7. 7
  8. 83
  9. 69
  10. 8
  11. 58
  12. 31
  13. 21
  14. 9
  15. 14
  16. 6
  17. 60
  18. 4
  19. 62
  20. 61
  21. 66
  22. 24
  23. 38
  24. 74
  25. 2
  26. 53
  27. 13
  28. 79
  29. 1
  30. 85
  31. 43
  32. 82
  33. 40
  34. 87
  35. 86
  36. 78
  37. 39
  38. 30
  39. 36
  40. 84

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