← 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 713 · 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. 2.23 + ? = 100
  3. 3.9 + ? = 10
  4. 4.70 + ? = 100
  5. 5.45 + ? = 100
  6. 6.5 + ? = 10
  7. 7.59 + ? = 100
  8. 8.47 + ? = 100
  9. 9.65 + ? = 100
  10. 10.34 + ? = 100
  11. 11.81 + ? = 100
  12. 12.50 + ? = 100
  13. 13.66 + ? = 100
  14. 14.71 + ? = 100
  15. 15.57 + ? = 100
  16. 16.77 + ? = 100
  17. 17.8 + ? = 10
  18. 18.6 + ? = 10
  19. 19.49 + ? = 100
  20. 20.11 + ? = 100
  21. 21.7 + ? = 10
  22. 22.16 + ? = 100
  23. 23.21 + ? = 100
  24. 24.43 + ? = 100
  25. 25.39 + ? = 100
  26. 26.19 + ? = 100
  27. 27.2 + ? = 10
  28. 28.86 + ? = 100
  29. 29.82 + ? = 100
  30. 30.3 + ? = 10
  31. 31.75 + ? = 100
  32. 32.13 + ? = 100
  33. 33.22 + ? = 100
  34. 34.84 + ? = 100
  35. 35.15 + ? = 100
  36. 36.67 + ? = 100
  37. 37.36 + ? = 100
  38. 38.62 + ? = 100
  39. 39.25 + ? = 100
  40. 40.12 + ? = 100

Answer key

  1. 9
  2. 77
  3. 1
  4. 30
  5. 55
  6. 5
  7. 41
  8. 53
  9. 35
  10. 66
  11. 19
  12. 50
  13. 34
  14. 29
  15. 43
  16. 23
  17. 2
  18. 4
  19. 51
  20. 89
  21. 3
  22. 84
  23. 79
  24. 57
  25. 61
  26. 81
  27. 8
  28. 14
  29. 18
  30. 7
  31. 25
  32. 87
  33. 78
  34. 16
  35. 85
  36. 33
  37. 64
  38. 38
  39. 75
  40. 88

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