← 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 347 · 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. 1.41 + ? = 100
  2. 2.2 + ? = 10
  3. 3.3 + ? = 10
  4. 4.71 + ? = 100
  5. 5.44 + ? = 100
  6. 6.30 + ? = 100
  7. 7.8 + ? = 10
  8. 8.6 + ? = 10
  9. 9.69 + ? = 100
  10. 10.45 + ? = 100
  11. 11.7 + ? = 10
  12. 12.11 + ? = 100
  13. 13.4 + ? = 10
  14. 14.9 + ? = 10
  15. 15.31 + ? = 100
  16. 16.70 + ? = 100
  17. 17.36 + ? = 100
  18. 18.15 + ? = 100
  19. 19.32 + ? = 100
  20. 20.24 + ? = 100
  21. 21.28 + ? = 100
  22. 22.48 + ? = 100
  23. 23.66 + ? = 100
  24. 24.23 + ? = 100
  25. 25.78 + ? = 100
  26. 26.64 + ? = 100
  27. 27.5 + ? = 10
  28. 28.62 + ? = 100
  29. 29.1 + ? = 10
  30. 30.22 + ? = 100
  31. 31.47 + ? = 100
  32. 32.46 + ? = 100
  33. 33.80 + ? = 100
  34. 34.58 + ? = 100
  35. 35.59 + ? = 100
  36. 36.51 + ? = 100
  37. 37.19 + ? = 100
  38. 38.77 + ? = 100
  39. 39.29 + ? = 100
  40. 40.76 + ? = 100

Answer key

  1. 59
  2. 8
  3. 7
  4. 29
  5. 56
  6. 70
  7. 2
  8. 4
  9. 31
  10. 55
  11. 3
  12. 89
  13. 6
  14. 1
  15. 69
  16. 30
  17. 64
  18. 85
  19. 68
  20. 76
  21. 72
  22. 52
  23. 34
  24. 77
  25. 22
  26. 36
  27. 5
  28. 38
  29. 9
  30. 78
  31. 53
  32. 54
  33. 20
  34. 42
  35. 41
  36. 49
  37. 81
  38. 23
  39. 71
  40. 24

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