← 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 472 · 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. 1.20 + ? = 100
  2. 2.29 + ? = 100
  3. 3.5 + ? = 10
  4. 4.51 + ? = 100
  5. 5.61 + ? = 100
  6. 6.11 + ? = 100
  7. 7.9 + ? = 10
  8. 8.3 + ? = 10
  9. 9.65 + ? = 100
  10. 10.2 + ? = 10
  11. 11.8 + ? = 10
  12. 12.6 + ? = 10
  13. 13.59 + ? = 100
  14. 14.1 + ? = 10
  15. 15.17 + ? = 100
  16. 16.26 + ? = 100
  17. 17.4 + ? = 10
  18. 18.38 + ? = 100
  19. 19.71 + ? = 100
  20. 20.43 + ? = 100
  21. 21.86 + ? = 100
  22. 22.60 + ? = 100
  23. 23.70 + ? = 100
  24. 24.48 + ? = 100
  25. 25.72 + ? = 100
  26. 26.33 + ? = 100
  27. 27.37 + ? = 100
  28. 28.7 + ? = 10
  29. 29.80 + ? = 100
  30. 30.28 + ? = 100
  31. 31.57 + ? = 100
  32. 32.45 + ? = 100
  33. 33.31 + ? = 100
  34. 34.23 + ? = 100
  35. 35.66 + ? = 100
  36. 36.73 + ? = 100
  37. 37.46 + ? = 100
  38. 38.15 + ? = 100
  39. 39.82 + ? = 100
  40. 40.74 + ? = 100

Answer key

  1. 80
  2. 71
  3. 5
  4. 49
  5. 39
  6. 89
  7. 1
  8. 7
  9. 35
  10. 8
  11. 2
  12. 4
  13. 41
  14. 9
  15. 83
  16. 74
  17. 6
  18. 62
  19. 29
  20. 57
  21. 14
  22. 40
  23. 30
  24. 52
  25. 28
  26. 67
  27. 63
  28. 3
  29. 20
  30. 72
  31. 43
  32. 55
  33. 69
  34. 77
  35. 34
  36. 27
  37. 54
  38. 85
  39. 18
  40. 26

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