← 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 224 · 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. 1.6 + ? = 10
  2. 2.58 + ? = 100
  3. 3.7 + ? = 10
  4. 4.8 + ? = 10
  5. 5.27 + ? = 100
  6. 6.67 + ? = 100
  7. 7.25 + ? = 100
  8. 8.16 + ? = 100
  9. 9.4 + ? = 10
  10. 10.9 + ? = 10
  11. 11.3 + ? = 10
  12. 12.70 + ? = 100
  13. 13.5 + ? = 10
  14. 14.32 + ? = 100
  15. 15.18 + ? = 100
  16. 16.73 + ? = 100
  17. 17.29 + ? = 100
  18. 18.79 + ? = 100
  19. 19.38 + ? = 100
  20. 20.80 + ? = 100
  21. 21.31 + ? = 100
  22. 22.22 + ? = 100
  23. 23.2 + ? = 10
  24. 24.42 + ? = 100
  25. 25.48 + ? = 100
  26. 26.47 + ? = 100
  27. 27.45 + ? = 100
  28. 28.74 + ? = 100
  29. 29.39 + ? = 100
  30. 30.77 + ? = 100
  31. 31.1 + ? = 10
  32. 32.30 + ? = 100
  33. 33.14 + ? = 100
  34. 34.89 + ? = 100
  35. 35.35 + ? = 100
  36. 36.20 + ? = 100
  37. 37.24 + ? = 100
  38. 38.69 + ? = 100
  39. 39.62 + ? = 100
  40. 40.61 + ? = 100

Answer key

  1. 4
  2. 42
  3. 3
  4. 2
  5. 73
  6. 33
  7. 75
  8. 84
  9. 6
  10. 1
  11. 7
  12. 30
  13. 5
  14. 68
  15. 82
  16. 27
  17. 71
  18. 21
  19. 62
  20. 20
  21. 69
  22. 78
  23. 8
  24. 58
  25. 52
  26. 53
  27. 55
  28. 26
  29. 61
  30. 23
  31. 9
  32. 70
  33. 86
  34. 11
  35. 65
  36. 80
  37. 76
  38. 31
  39. 38
  40. 39

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