← 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 196 · 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. 1.33 + ? = 100
  2. 2.68 + ? = 100
  3. 3.1 + ? = 10
  4. 4.74 + ? = 100
  5. 5.50 + ? = 100
  6. 6.26 + ? = 100
  7. 7.38 + ? = 100
  8. 8.9 + ? = 10
  9. 9.2 + ? = 10
  10. 10.84 + ? = 100
  11. 11.11 + ? = 100
  12. 12.44 + ? = 100
  13. 13.5 + ? = 10
  14. 14.32 + ? = 100
  15. 15.27 + ? = 100
  16. 16.19 + ? = 100
  17. 17.23 + ? = 100
  18. 18.70 + ? = 100
  19. 19.6 + ? = 10
  20. 20.4 + ? = 10
  21. 21.29 + ? = 100
  22. 22.7 + ? = 10
  23. 23.30 + ? = 100
  24. 24.8 + ? = 10
  25. 25.55 + ? = 100
  26. 26.36 + ? = 100
  27. 27.31 + ? = 100
  28. 28.89 + ? = 100
  29. 29.64 + ? = 100
  30. 30.76 + ? = 100
  31. 31.48 + ? = 100
  32. 32.39 + ? = 100
  33. 33.3 + ? = 10
  34. 34.77 + ? = 100
  35. 35.40 + ? = 100
  36. 36.69 + ? = 100
  37. 37.43 + ? = 100
  38. 38.86 + ? = 100
  39. 39.52 + ? = 100
  40. 40.67 + ? = 100

Answer key

  1. 67
  2. 32
  3. 9
  4. 26
  5. 50
  6. 74
  7. 62
  8. 1
  9. 8
  10. 16
  11. 89
  12. 56
  13. 5
  14. 68
  15. 73
  16. 81
  17. 77
  18. 30
  19. 4
  20. 6
  21. 71
  22. 3
  23. 70
  24. 2
  25. 45
  26. 64
  27. 69
  28. 11
  29. 36
  30. 24
  31. 52
  32. 61
  33. 7
  34. 23
  35. 60
  36. 31
  37. 57
  38. 14
  39. 48
  40. 33

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