← 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 758 · 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. 1.8 + ? = 10
  2. 2.4 + ? = 10
  3. 3.84 + ? = 100
  4. 4.17 + ? = 100
  5. 5.68 + ? = 100
  6. 6.2 + ? = 10
  7. 7.86 + ? = 100
  8. 8.16 + ? = 100
  9. 9.79 + ? = 100
  10. 10.13 + ? = 100
  11. 11.9 + ? = 10
  12. 12.60 + ? = 100
  13. 13.44 + ? = 100
  14. 14.34 + ? = 100
  15. 15.85 + ? = 100
  16. 16.22 + ? = 100
  17. 17.59 + ? = 100
  18. 18.32 + ? = 100
  19. 19.67 + ? = 100
  20. 20.55 + ? = 100
  21. 21.30 + ? = 100
  22. 22.54 + ? = 100
  23. 23.88 + ? = 100
  24. 24.64 + ? = 100
  25. 25.1 + ? = 10
  26. 26.20 + ? = 100
  27. 27.70 + ? = 100
  28. 28.77 + ? = 100
  29. 29.6 + ? = 10
  30. 30.3 + ? = 10
  31. 31.26 + ? = 100
  32. 32.25 + ? = 100
  33. 33.50 + ? = 100
  34. 34.87 + ? = 100
  35. 35.41 + ? = 100
  36. 36.45 + ? = 100
  37. 37.42 + ? = 100
  38. 38.51 + ? = 100
  39. 39.24 + ? = 100
  40. 40.49 + ? = 100

Answer key

  1. 2
  2. 6
  3. 16
  4. 83
  5. 32
  6. 8
  7. 14
  8. 84
  9. 21
  10. 87
  11. 1
  12. 40
  13. 56
  14. 66
  15. 15
  16. 78
  17. 41
  18. 68
  19. 33
  20. 45
  21. 70
  22. 46
  23. 12
  24. 36
  25. 9
  26. 80
  27. 30
  28. 23
  29. 4
  30. 7
  31. 74
  32. 75
  33. 50
  34. 13
  35. 59
  36. 55
  37. 58
  38. 49
  39. 76
  40. 51

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