← 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 205 · 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. 1.74 + ? = 100
  2. 2.6 + ? = 10
  3. 3.8 + ? = 10
  4. 4.1 + ? = 10
  5. 5.37 + ? = 100
  6. 6.32 + ? = 100
  7. 7.60 + ? = 100
  8. 8.46 + ? = 100
  9. 9.2 + ? = 10
  10. 10.87 + ? = 100
  11. 11.88 + ? = 100
  12. 12.3 + ? = 10
  13. 13.76 + ? = 100
  14. 14.4 + ? = 10
  15. 15.69 + ? = 100
  16. 16.61 + ? = 100
  17. 17.21 + ? = 100
  18. 18.7 + ? = 10
  19. 19.54 + ? = 100
  20. 20.75 + ? = 100
  21. 21.12 + ? = 100
  22. 22.39 + ? = 100
  23. 23.85 + ? = 100
  24. 24.5 + ? = 10
  25. 25.28 + ? = 100
  26. 26.40 + ? = 100
  27. 27.81 + ? = 100
  28. 28.83 + ? = 100
  29. 29.38 + ? = 100
  30. 30.44 + ? = 100
  31. 31.35 + ? = 100
  32. 32.25 + ? = 100
  33. 33.26 + ? = 100
  34. 34.58 + ? = 100
  35. 35.68 + ? = 100
  36. 36.19 + ? = 100
  37. 37.23 + ? = 100
  38. 38.59 + ? = 100
  39. 39.33 + ? = 100
  40. 40.82 + ? = 100

Answer key

  1. 26
  2. 4
  3. 2
  4. 9
  5. 63
  6. 68
  7. 40
  8. 54
  9. 8
  10. 13
  11. 12
  12. 7
  13. 24
  14. 6
  15. 31
  16. 39
  17. 79
  18. 3
  19. 46
  20. 25
  21. 88
  22. 61
  23. 15
  24. 5
  25. 72
  26. 60
  27. 19
  28. 17
  29. 62
  30. 56
  31. 65
  32. 75
  33. 74
  34. 42
  35. 32
  36. 81
  37. 77
  38. 41
  39. 67
  40. 18

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