← 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 562 · 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. 2.1 + ? = 10
  3. 3.36 + ? = 100
  4. 4.9 + ? = 10
  5. 5.4 + ? = 10
  6. 6.68 + ? = 100
  7. 7.29 + ? = 100
  8. 8.41 + ? = 100
  9. 9.43 + ? = 100
  10. 10.3 + ? = 10
  11. 11.2 + ? = 10
  12. 12.57 + ? = 100
  13. 13.46 + ? = 100
  14. 14.69 + ? = 100
  15. 15.48 + ? = 100
  16. 16.50 + ? = 100
  17. 17.59 + ? = 100
  18. 18.54 + ? = 100
  19. 19.17 + ? = 100
  20. 20.14 + ? = 100
  21. 21.24 + ? = 100
  22. 22.58 + ? = 100
  23. 23.5 + ? = 10
  24. 24.82 + ? = 100
  25. 25.55 + ? = 100
  26. 26.8 + ? = 10
  27. 27.37 + ? = 100
  28. 28.63 + ? = 100
  29. 29.65 + ? = 100
  30. 30.25 + ? = 100
  31. 31.60 + ? = 100
  32. 32.66 + ? = 100
  33. 33.72 + ? = 100
  34. 34.6 + ? = 10
  35. 35.71 + ? = 100
  36. 36.77 + ? = 100
  37. 37.42 + ? = 100
  38. 38.73 + ? = 100
  39. 39.22 + ? = 100
  40. 40.28 + ? = 100

Answer key

  1. 3
  2. 9
  3. 64
  4. 1
  5. 6
  6. 32
  7. 71
  8. 59
  9. 57
  10. 7
  11. 8
  12. 43
  13. 54
  14. 31
  15. 52
  16. 50
  17. 41
  18. 46
  19. 83
  20. 86
  21. 76
  22. 42
  23. 5
  24. 18
  25. 45
  26. 2
  27. 63
  28. 37
  29. 35
  30. 75
  31. 40
  32. 34
  33. 28
  34. 4
  35. 29
  36. 23
  37. 58
  38. 27
  39. 78
  40. 72

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