← 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 44 · 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. 1.1 + ? = 10
  2. 2.40 + ? = 100
  3. 3.52 + ? = 100
  4. 4.38 + ? = 100
  5. 5.21 + ? = 100
  6. 6.6 + ? = 10
  7. 7.4 + ? = 10
  8. 8.19 + ? = 100
  9. 9.56 + ? = 100
  10. 10.55 + ? = 100
  11. 11.72 + ? = 100
  12. 12.20 + ? = 100
  13. 13.9 + ? = 10
  14. 14.80 + ? = 100
  15. 15.57 + ? = 100
  16. 16.7 + ? = 10
  17. 17.3 + ? = 10
  18. 18.39 + ? = 100
  19. 19.89 + ? = 100
  20. 20.59 + ? = 100
  21. 21.58 + ? = 100
  22. 22.25 + ? = 100
  23. 23.42 + ? = 100
  24. 24.31 + ? = 100
  25. 25.8 + ? = 10
  26. 26.81 + ? = 100
  27. 27.53 + ? = 100
  28. 28.22 + ? = 100
  29. 29.5 + ? = 10
  30. 30.37 + ? = 100
  31. 31.68 + ? = 100
  32. 32.23 + ? = 100
  33. 33.70 + ? = 100
  34. 34.74 + ? = 100
  35. 35.66 + ? = 100
  36. 36.14 + ? = 100
  37. 37.44 + ? = 100
  38. 38.35 + ? = 100
  39. 39.79 + ? = 100
  40. 40.67 + ? = 100

Answer key

  1. 9
  2. 60
  3. 48
  4. 62
  5. 79
  6. 4
  7. 6
  8. 81
  9. 44
  10. 45
  11. 28
  12. 80
  13. 1
  14. 20
  15. 43
  16. 3
  17. 7
  18. 61
  19. 11
  20. 41
  21. 42
  22. 75
  23. 58
  24. 69
  25. 2
  26. 19
  27. 47
  28. 78
  29. 5
  30. 63
  31. 32
  32. 77
  33. 30
  34. 26
  35. 34
  36. 86
  37. 56
  38. 65
  39. 21
  40. 33

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