← 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 841 · 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. 1.39 + ? = 100
  2. 2.56 + ? = 100
  3. 3.1 + ? = 10
  4. 4.5 + ? = 10
  5. 5.6 + ? = 10
  6. 6.84 + ? = 100
  7. 7.22 + ? = 100
  8. 8.4 + ? = 10
  9. 9.71 + ? = 100
  10. 10.9 + ? = 10
  11. 11.3 + ? = 10
  12. 12.11 + ? = 100
  13. 13.73 + ? = 100
  14. 14.35 + ? = 100
  15. 15.58 + ? = 100
  16. 16.50 + ? = 100
  17. 17.81 + ? = 100
  18. 18.2 + ? = 10
  19. 19.59 + ? = 100
  20. 20.75 + ? = 100
  21. 21.40 + ? = 100
  22. 22.63 + ? = 100
  23. 23.51 + ? = 100
  24. 24.53 + ? = 100
  25. 25.27 + ? = 100
  26. 26.80 + ? = 100
  27. 27.24 + ? = 100
  28. 28.31 + ? = 100
  29. 29.72 + ? = 100
  30. 30.79 + ? = 100
  31. 31.86 + ? = 100
  32. 32.76 + ? = 100
  33. 33.26 + ? = 100
  34. 34.18 + ? = 100
  35. 35.17 + ? = 100
  36. 36.21 + ? = 100
  37. 37.7 + ? = 10
  38. 38.34 + ? = 100
  39. 39.14 + ? = 100
  40. 40.8 + ? = 10

Answer key

  1. 61
  2. 44
  3. 9
  4. 5
  5. 4
  6. 16
  7. 78
  8. 6
  9. 29
  10. 1
  11. 7
  12. 89
  13. 27
  14. 65
  15. 42
  16. 50
  17. 19
  18. 8
  19. 41
  20. 25
  21. 60
  22. 37
  23. 49
  24. 47
  25. 73
  26. 20
  27. 76
  28. 69
  29. 28
  30. 21
  31. 14
  32. 24
  33. 74
  34. 82
  35. 83
  36. 79
  37. 3
  38. 66
  39. 86
  40. 2

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