← 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 522 · 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. 1.6 + ? = 10
  2. 2.16 + ? = 100
  3. 3.15 + ? = 100
  4. 4.55 + ? = 100
  5. 5.7 + ? = 10
  6. 6.42 + ? = 100
  7. 7.30 + ? = 100
  8. 8.62 + ? = 100
  9. 9.57 + ? = 100
  10. 10.21 + ? = 100
  11. 11.3 + ? = 10
  12. 12.2 + ? = 10
  13. 13.24 + ? = 100
  14. 14.73 + ? = 100
  15. 15.5 + ? = 10
  16. 16.9 + ? = 10
  17. 17.66 + ? = 100
  18. 18.71 + ? = 100
  19. 19.54 + ? = 100
  20. 20.12 + ? = 100
  21. 21.1 + ? = 10
  22. 22.33 + ? = 100
  23. 23.25 + ? = 100
  24. 24.26 + ? = 100
  25. 25.28 + ? = 100
  26. 26.84 + ? = 100
  27. 27.22 + ? = 100
  28. 28.43 + ? = 100
  29. 29.38 + ? = 100
  30. 30.88 + ? = 100
  31. 31.8 + ? = 10
  32. 32.46 + ? = 100
  33. 33.45 + ? = 100
  34. 34.79 + ? = 100
  35. 35.4 + ? = 10
  36. 36.85 + ? = 100
  37. 37.74 + ? = 100
  38. 38.77 + ? = 100
  39. 39.87 + ? = 100
  40. 40.67 + ? = 100

Answer key

  1. 4
  2. 84
  3. 85
  4. 45
  5. 3
  6. 58
  7. 70
  8. 38
  9. 43
  10. 79
  11. 7
  12. 8
  13. 76
  14. 27
  15. 5
  16. 1
  17. 34
  18. 29
  19. 46
  20. 88
  21. 9
  22. 67
  23. 75
  24. 74
  25. 72
  26. 16
  27. 78
  28. 57
  29. 62
  30. 12
  31. 2
  32. 54
  33. 55
  34. 21
  35. 6
  36. 15
  37. 26
  38. 23
  39. 13
  40. 33

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