← 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 248 · 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. 1.9 + ? = 10
  2. 2.42 + ? = 100
  3. 3.1 + ? = 10
  4. 4.34 + ? = 100
  5. 5.83 + ? = 100
  6. 6.5 + ? = 10
  7. 7.63 + ? = 100
  8. 8.30 + ? = 100
  9. 9.14 + ? = 100
  10. 10.4 + ? = 10
  11. 11.60 + ? = 100
  12. 12.87 + ? = 100
  13. 13.3 + ? = 10
  14. 14.74 + ? = 100
  15. 15.35 + ? = 100
  16. 16.11 + ? = 100
  17. 17.40 + ? = 100
  18. 18.7 + ? = 10
  19. 19.67 + ? = 100
  20. 20.19 + ? = 100
  21. 21.84 + ? = 100
  22. 22.41 + ? = 100
  23. 23.44 + ? = 100
  24. 24.2 + ? = 10
  25. 25.50 + ? = 100
  26. 26.81 + ? = 100
  27. 27.33 + ? = 100
  28. 28.62 + ? = 100
  29. 29.18 + ? = 100
  30. 30.6 + ? = 10
  31. 31.66 + ? = 100
  32. 32.52 + ? = 100
  33. 33.72 + ? = 100
  34. 34.46 + ? = 100
  35. 35.64 + ? = 100
  36. 36.36 + ? = 100
  37. 37.65 + ? = 100
  38. 38.38 + ? = 100
  39. 39.13 + ? = 100
  40. 40.56 + ? = 100

Answer key

  1. 1
  2. 58
  3. 9
  4. 66
  5. 17
  6. 5
  7. 37
  8. 70
  9. 86
  10. 6
  11. 40
  12. 13
  13. 7
  14. 26
  15. 65
  16. 89
  17. 60
  18. 3
  19. 33
  20. 81
  21. 16
  22. 59
  23. 56
  24. 8
  25. 50
  26. 19
  27. 67
  28. 38
  29. 82
  30. 4
  31. 34
  32. 48
  33. 28
  34. 54
  35. 36
  36. 64
  37. 35
  38. 62
  39. 87
  40. 44

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