← 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 160 · 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. 1.55 + ? = 100
  2. 2.8 + ? = 10
  3. 3.21 + ? = 100
  4. 4.71 + ? = 100
  5. 5.2 + ? = 10
  6. 6.14 + ? = 100
  7. 7.9 + ? = 10
  8. 8.42 + ? = 100
  9. 9.5 + ? = 10
  10. 10.47 + ? = 100
  11. 11.88 + ? = 100
  12. 12.37 + ? = 100
  13. 13.23 + ? = 100
  14. 14.61 + ? = 100
  15. 15.51 + ? = 100
  16. 16.67 + ? = 100
  17. 17.7 + ? = 10
  18. 18.1 + ? = 10
  19. 19.3 + ? = 10
  20. 20.85 + ? = 100
  21. 21.18 + ? = 100
  22. 22.82 + ? = 100
  23. 23.50 + ? = 100
  24. 24.87 + ? = 100
  25. 25.4 + ? = 10
  26. 26.77 + ? = 100
  27. 27.80 + ? = 100
  28. 28.53 + ? = 100
  29. 29.6 + ? = 10
  30. 30.38 + ? = 100
  31. 31.13 + ? = 100
  32. 32.39 + ? = 100
  33. 33.84 + ? = 100
  34. 34.79 + ? = 100
  35. 35.17 + ? = 100
  36. 36.35 + ? = 100
  37. 37.27 + ? = 100
  38. 38.28 + ? = 100
  39. 39.57 + ? = 100
  40. 40.34 + ? = 100

Answer key

  1. 45
  2. 2
  3. 79
  4. 29
  5. 8
  6. 86
  7. 1
  8. 58
  9. 5
  10. 53
  11. 12
  12. 63
  13. 77
  14. 39
  15. 49
  16. 33
  17. 3
  18. 9
  19. 7
  20. 15
  21. 82
  22. 18
  23. 50
  24. 13
  25. 6
  26. 23
  27. 20
  28. 47
  29. 4
  30. 62
  31. 87
  32. 61
  33. 16
  34. 21
  35. 83
  36. 65
  37. 73
  38. 72
  39. 43
  40. 66

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