← 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 524 · 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. 1.4 + ? = 10
  2. 2.5 + ? = 10
  3. 3.67 + ? = 100
  4. 4.3 + ? = 10
  5. 5.8 + ? = 10
  6. 6.14 + ? = 100
  7. 7.50 + ? = 100
  8. 8.68 + ? = 100
  9. 9.78 + ? = 100
  10. 10.38 + ? = 100
  11. 11.77 + ? = 100
  12. 12.42 + ? = 100
  13. 13.76 + ? = 100
  14. 14.6 + ? = 10
  15. 15.18 + ? = 100
  16. 16.1 + ? = 10
  17. 17.9 + ? = 10
  18. 18.2 + ? = 10
  19. 19.40 + ? = 100
  20. 20.15 + ? = 100
  21. 21.26 + ? = 100
  22. 22.89 + ? = 100
  23. 23.49 + ? = 100
  24. 24.54 + ? = 100
  25. 25.41 + ? = 100
  26. 26.7 + ? = 10
  27. 27.20 + ? = 100
  28. 28.80 + ? = 100
  29. 29.66 + ? = 100
  30. 30.56 + ? = 100
  31. 31.53 + ? = 100
  32. 32.69 + ? = 100
  33. 33.48 + ? = 100
  34. 34.25 + ? = 100
  35. 35.13 + ? = 100
  36. 36.31 + ? = 100
  37. 37.55 + ? = 100
  38. 38.87 + ? = 100
  39. 39.52 + ? = 100
  40. 40.84 + ? = 100

Answer key

  1. 6
  2. 5
  3. 33
  4. 7
  5. 2
  6. 86
  7. 50
  8. 32
  9. 22
  10. 62
  11. 23
  12. 58
  13. 24
  14. 4
  15. 82
  16. 9
  17. 1
  18. 8
  19. 60
  20. 85
  21. 74
  22. 11
  23. 51
  24. 46
  25. 59
  26. 3
  27. 80
  28. 20
  29. 34
  30. 44
  31. 47
  32. 31
  33. 52
  34. 75
  35. 87
  36. 69
  37. 45
  38. 13
  39. 48
  40. 16

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