← 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 369 · 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. 1.6 + ? = 10
  2. 2.18 + ? = 100
  3. 3.76 + ? = 100
  4. 4.68 + ? = 100
  5. 5.5 + ? = 10
  6. 6.43 + ? = 100
  7. 7.9 + ? = 10
  8. 8.59 + ? = 100
  9. 9.13 + ? = 100
  10. 10.71 + ? = 100
  11. 11.4 + ? = 10
  12. 12.1 + ? = 10
  13. 13.83 + ? = 100
  14. 14.30 + ? = 100
  15. 15.69 + ? = 100
  16. 16.3 + ? = 10
  17. 17.8 + ? = 10
  18. 18.21 + ? = 100
  19. 19.2 + ? = 10
  20. 20.29 + ? = 100
  21. 21.82 + ? = 100
  22. 22.7 + ? = 10
  23. 23.52 + ? = 100
  24. 24.11 + ? = 100
  25. 25.25 + ? = 100
  26. 26.34 + ? = 100
  27. 27.31 + ? = 100
  28. 28.14 + ? = 100
  29. 29.67 + ? = 100
  30. 30.17 + ? = 100
  31. 31.35 + ? = 100
  32. 32.57 + ? = 100
  33. 33.36 + ? = 100
  34. 34.49 + ? = 100
  35. 35.61 + ? = 100
  36. 36.89 + ? = 100
  37. 37.51 + ? = 100
  38. 38.84 + ? = 100
  39. 39.56 + ? = 100
  40. 40.48 + ? = 100

Answer key

  1. 4
  2. 82
  3. 24
  4. 32
  5. 5
  6. 57
  7. 1
  8. 41
  9. 87
  10. 29
  11. 6
  12. 9
  13. 17
  14. 70
  15. 31
  16. 7
  17. 2
  18. 79
  19. 8
  20. 71
  21. 18
  22. 3
  23. 48
  24. 89
  25. 75
  26. 66
  27. 69
  28. 86
  29. 33
  30. 83
  31. 65
  32. 43
  33. 64
  34. 51
  35. 39
  36. 11
  37. 49
  38. 16
  39. 44
  40. 52

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