← 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 761 · 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. 1.46 + ? = 100
  2. 2.9 + ? = 10
  3. 3.2 + ? = 10
  4. 4.70 + ? = 100
  5. 5.3 + ? = 10
  6. 6.48 + ? = 100
  7. 7.6 + ? = 10
  8. 8.31 + ? = 100
  9. 9.21 + ? = 100
  10. 10.15 + ? = 100
  11. 11.7 + ? = 10
  12. 12.28 + ? = 100
  13. 13.78 + ? = 100
  14. 14.25 + ? = 100
  15. 15.17 + ? = 100
  16. 16.4 + ? = 10
  17. 17.8 + ? = 10
  18. 18.5 + ? = 10
  19. 19.18 + ? = 100
  20. 20.38 + ? = 100
  21. 21.59 + ? = 100
  22. 22.36 + ? = 100
  23. 23.76 + ? = 100
  24. 24.14 + ? = 100
  25. 25.35 + ? = 100
  26. 26.40 + ? = 100
  27. 27.54 + ? = 100
  28. 28.39 + ? = 100
  29. 29.58 + ? = 100
  30. 30.67 + ? = 100
  31. 31.80 + ? = 100
  32. 32.33 + ? = 100
  33. 33.43 + ? = 100
  34. 34.1 + ? = 10
  35. 35.86 + ? = 100
  36. 36.83 + ? = 100
  37. 37.69 + ? = 100
  38. 38.75 + ? = 100
  39. 39.23 + ? = 100
  40. 40.79 + ? = 100

Answer key

  1. 54
  2. 1
  3. 8
  4. 30
  5. 7
  6. 52
  7. 4
  8. 69
  9. 79
  10. 85
  11. 3
  12. 72
  13. 22
  14. 75
  15. 83
  16. 6
  17. 2
  18. 5
  19. 82
  20. 62
  21. 41
  22. 64
  23. 24
  24. 86
  25. 65
  26. 60
  27. 46
  28. 61
  29. 42
  30. 33
  31. 20
  32. 67
  33. 57
  34. 9
  35. 14
  36. 17
  37. 31
  38. 25
  39. 77
  40. 21

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