← 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 104 · 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. 1.7 + ? = 10
  2. 2.8 + ? = 10
  3. 3.34 + ? = 100
  4. 4.17 + ? = 100
  5. 5.29 + ? = 100
  6. 6.5 + ? = 10
  7. 7.1 + ? = 10
  8. 8.4 + ? = 10
  9. 9.6 + ? = 10
  10. 10.77 + ? = 100
  11. 11.36 + ? = 100
  12. 12.3 + ? = 10
  13. 13.15 + ? = 100
  14. 14.88 + ? = 100
  15. 15.46 + ? = 100
  16. 16.39 + ? = 100
  17. 17.20 + ? = 100
  18. 18.37 + ? = 100
  19. 19.28 + ? = 100
  20. 20.63 + ? = 100
  21. 21.2 + ? = 10
  22. 22.50 + ? = 100
  23. 23.9 + ? = 10
  24. 24.85 + ? = 100
  25. 25.41 + ? = 100
  26. 26.84 + ? = 100
  27. 27.83 + ? = 100
  28. 28.73 + ? = 100
  29. 29.68 + ? = 100
  30. 30.31 + ? = 100
  31. 31.62 + ? = 100
  32. 32.30 + ? = 100
  33. 33.51 + ? = 100
  34. 34.80 + ? = 100
  35. 35.56 + ? = 100
  36. 36.74 + ? = 100
  37. 37.32 + ? = 100
  38. 38.35 + ? = 100
  39. 39.11 + ? = 100
  40. 40.19 + ? = 100

Answer key

  1. 3
  2. 2
  3. 66
  4. 83
  5. 71
  6. 5
  7. 9
  8. 6
  9. 4
  10. 23
  11. 64
  12. 7
  13. 85
  14. 12
  15. 54
  16. 61
  17. 80
  18. 63
  19. 72
  20. 37
  21. 8
  22. 50
  23. 1
  24. 15
  25. 59
  26. 16
  27. 17
  28. 27
  29. 32
  30. 69
  31. 38
  32. 70
  33. 49
  34. 20
  35. 44
  36. 26
  37. 68
  38. 65
  39. 89
  40. 81

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