← 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 853 · 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. 1.3 + ? = 10
  2. 2.70 + ? = 100
  3. 3.9 + ? = 10
  4. 4.4 + ? = 10
  5. 5.2 + ? = 10
  6. 6.88 + ? = 100
  7. 7.34 + ? = 100
  8. 8.21 + ? = 100
  9. 9.8 + ? = 10
  10. 10.6 + ? = 10
  11. 11.11 + ? = 100
  12. 12.12 + ? = 100
  13. 13.5 + ? = 10
  14. 14.46 + ? = 100
  15. 15.58 + ? = 100
  16. 16.59 + ? = 100
  17. 17.16 + ? = 100
  18. 18.89 + ? = 100
  19. 19.23 + ? = 100
  20. 20.83 + ? = 100
  21. 21.44 + ? = 100
  22. 22.14 + ? = 100
  23. 23.81 + ? = 100
  24. 24.69 + ? = 100
  25. 25.79 + ? = 100
  26. 26.63 + ? = 100
  27. 27.50 + ? = 100
  28. 28.77 + ? = 100
  29. 29.42 + ? = 100
  30. 30.7 + ? = 10
  31. 31.20 + ? = 100
  32. 32.39 + ? = 100
  33. 33.54 + ? = 100
  34. 34.49 + ? = 100
  35. 35.33 + ? = 100
  36. 36.75 + ? = 100
  37. 37.78 + ? = 100
  38. 38.82 + ? = 100
  39. 39.28 + ? = 100
  40. 40.72 + ? = 100

Answer key

  1. 7
  2. 30
  3. 1
  4. 6
  5. 8
  6. 12
  7. 66
  8. 79
  9. 2
  10. 4
  11. 89
  12. 88
  13. 5
  14. 54
  15. 42
  16. 41
  17. 84
  18. 11
  19. 77
  20. 17
  21. 56
  22. 86
  23. 19
  24. 31
  25. 21
  26. 37
  27. 50
  28. 23
  29. 58
  30. 3
  31. 80
  32. 61
  33. 46
  34. 51
  35. 67
  36. 25
  37. 22
  38. 18
  39. 72
  40. 28

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