← 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 739 · 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. 1.15 + ? = 100
  2. 2.7 + ? = 10
  3. 3.83 + ? = 100
  4. 4.87 + ? = 100
  5. 5.37 + ? = 100
  6. 6.24 + ? = 100
  7. 7.1 + ? = 10
  8. 8.51 + ? = 100
  9. 9.4 + ? = 10
  10. 10.3 + ? = 10
  11. 11.28 + ? = 100
  12. 12.55 + ? = 100
  13. 13.48 + ? = 100
  14. 14.6 + ? = 10
  15. 15.50 + ? = 100
  16. 16.46 + ? = 100
  17. 17.9 + ? = 10
  18. 18.82 + ? = 100
  19. 19.57 + ? = 100
  20. 20.72 + ? = 100
  21. 21.84 + ? = 100
  22. 22.29 + ? = 100
  23. 23.45 + ? = 100
  24. 24.47 + ? = 100
  25. 25.42 + ? = 100
  26. 26.76 + ? = 100
  27. 27.40 + ? = 100
  28. 28.2 + ? = 10
  29. 29.80 + ? = 100
  30. 30.59 + ? = 100
  31. 31.11 + ? = 100
  32. 32.74 + ? = 100
  33. 33.5 + ? = 10
  34. 34.31 + ? = 100
  35. 35.26 + ? = 100
  36. 36.85 + ? = 100
  37. 37.32 + ? = 100
  38. 38.67 + ? = 100
  39. 39.68 + ? = 100
  40. 40.53 + ? = 100

Answer key

  1. 85
  2. 3
  3. 17
  4. 13
  5. 63
  6. 76
  7. 9
  8. 49
  9. 6
  10. 7
  11. 72
  12. 45
  13. 52
  14. 4
  15. 50
  16. 54
  17. 1
  18. 18
  19. 43
  20. 28
  21. 16
  22. 71
  23. 55
  24. 53
  25. 58
  26. 24
  27. 60
  28. 8
  29. 20
  30. 41
  31. 89
  32. 26
  33. 5
  34. 69
  35. 74
  36. 15
  37. 68
  38. 33
  39. 32
  40. 47

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