← 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 141 · 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. 1.57 + ? = 100
  2. 2.2 + ? = 10
  3. 3.43 + ? = 100
  4. 4.39 + ? = 100
  5. 5.36 + ? = 100
  6. 6.74 + ? = 100
  7. 7.82 + ? = 100
  8. 8.37 + ? = 100
  9. 9.45 + ? = 100
  10. 10.1 + ? = 10
  11. 11.20 + ? = 100
  12. 12.41 + ? = 100
  13. 13.4 + ? = 10
  14. 14.58 + ? = 100
  15. 15.5 + ? = 10
  16. 16.68 + ? = 100
  17. 17.51 + ? = 100
  18. 18.78 + ? = 100
  19. 19.34 + ? = 100
  20. 20.23 + ? = 100
  21. 21.24 + ? = 100
  22. 22.60 + ? = 100
  23. 23.9 + ? = 10
  24. 24.6 + ? = 10
  25. 25.16 + ? = 100
  26. 26.59 + ? = 100
  27. 27.8 + ? = 10
  28. 28.88 + ? = 100
  29. 29.62 + ? = 100
  30. 30.28 + ? = 100
  31. 31.21 + ? = 100
  32. 32.35 + ? = 100
  33. 33.26 + ? = 100
  34. 34.3 + ? = 10
  35. 35.33 + ? = 100
  36. 36.75 + ? = 100
  37. 37.7 + ? = 10
  38. 38.64 + ? = 100
  39. 39.53 + ? = 100
  40. 40.42 + ? = 100

Answer key

  1. 43
  2. 8
  3. 57
  4. 61
  5. 64
  6. 26
  7. 18
  8. 63
  9. 55
  10. 9
  11. 80
  12. 59
  13. 6
  14. 42
  15. 5
  16. 32
  17. 49
  18. 22
  19. 66
  20. 77
  21. 76
  22. 40
  23. 1
  24. 4
  25. 84
  26. 41
  27. 2
  28. 12
  29. 38
  30. 72
  31. 79
  32. 65
  33. 74
  34. 7
  35. 67
  36. 25
  37. 3
  38. 36
  39. 47
  40. 58

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