← 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 815 · 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. 1.2 + ? = 10
  2. 2.89 + ? = 100
  3. 3.9 + ? = 10
  4. 4.4 + ? = 10
  5. 5.28 + ? = 100
  6. 6.80 + ? = 100
  7. 7.39 + ? = 100
  8. 8.59 + ? = 100
  9. 9.1 + ? = 10
  10. 10.21 + ? = 100
  11. 11.5 + ? = 10
  12. 12.14 + ? = 100
  13. 13.77 + ? = 100
  14. 14.8 + ? = 10
  15. 15.3 + ? = 10
  16. 16.6 + ? = 10
  17. 17.33 + ? = 100
  18. 18.46 + ? = 100
  19. 19.76 + ? = 100
  20. 20.22 + ? = 100
  21. 21.36 + ? = 100
  22. 22.67 + ? = 100
  23. 23.78 + ? = 100
  24. 24.50 + ? = 100
  25. 25.31 + ? = 100
  26. 26.82 + ? = 100
  27. 27.57 + ? = 100
  28. 28.61 + ? = 100
  29. 29.16 + ? = 100
  30. 30.81 + ? = 100
  31. 31.7 + ? = 10
  32. 32.87 + ? = 100
  33. 33.68 + ? = 100
  34. 34.58 + ? = 100
  35. 35.63 + ? = 100
  36. 36.75 + ? = 100
  37. 37.74 + ? = 100
  38. 38.37 + ? = 100
  39. 39.60 + ? = 100
  40. 40.53 + ? = 100

Answer key

  1. 8
  2. 11
  3. 1
  4. 6
  5. 72
  6. 20
  7. 61
  8. 41
  9. 9
  10. 79
  11. 5
  12. 86
  13. 23
  14. 2
  15. 7
  16. 4
  17. 67
  18. 54
  19. 24
  20. 78
  21. 64
  22. 33
  23. 22
  24. 50
  25. 69
  26. 18
  27. 43
  28. 39
  29. 84
  30. 19
  31. 3
  32. 13
  33. 32
  34. 42
  35. 37
  36. 25
  37. 26
  38. 63
  39. 40
  40. 47

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