← 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 438 · 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. 2.38 + ? = 100
  3. 3.41 + ? = 100
  4. 4.3 + ? = 10
  5. 5.85 + ? = 100
  6. 6.2 + ? = 10
  7. 7.4 + ? = 10
  8. 8.46 + ? = 100
  9. 9.6 + ? = 10
  10. 10.11 + ? = 100
  11. 11.34 + ? = 100
  12. 12.5 + ? = 10
  13. 13.50 + ? = 100
  14. 14.73 + ? = 100
  15. 15.74 + ? = 100
  16. 16.19 + ? = 100
  17. 17.7 + ? = 10
  18. 18.88 + ? = 100
  19. 19.13 + ? = 100
  20. 20.8 + ? = 10
  21. 21.25 + ? = 100
  22. 22.20 + ? = 100
  23. 23.26 + ? = 100
  24. 24.36 + ? = 100
  25. 25.48 + ? = 100
  26. 26.17 + ? = 100
  27. 27.83 + ? = 100
  28. 28.75 + ? = 100
  29. 29.15 + ? = 100
  30. 30.16 + ? = 100
  31. 31.47 + ? = 100
  32. 32.9 + ? = 10
  33. 33.43 + ? = 100
  34. 34.78 + ? = 100
  35. 35.24 + ? = 100
  36. 36.72 + ? = 100
  37. 37.51 + ? = 100
  38. 38.28 + ? = 100
  39. 39.67 + ? = 100
  40. 40.18 + ? = 100

Answer key

  1. 9
  2. 62
  3. 59
  4. 7
  5. 15
  6. 8
  7. 6
  8. 54
  9. 4
  10. 89
  11. 66
  12. 5
  13. 50
  14. 27
  15. 26
  16. 81
  17. 3
  18. 12
  19. 87
  20. 2
  21. 75
  22. 80
  23. 74
  24. 64
  25. 52
  26. 83
  27. 17
  28. 25
  29. 85
  30. 84
  31. 53
  32. 1
  33. 57
  34. 22
  35. 76
  36. 28
  37. 49
  38. 72
  39. 33
  40. 82

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