← 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 913 · 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. 1.43 + ? = 100
  2. 2.29 + ? = 100
  3. 3.86 + ? = 100
  4. 4.7 + ? = 10
  5. 5.6 + ? = 10
  6. 6.8 + ? = 10
  7. 7.17 + ? = 100
  8. 8.5 + ? = 10
  9. 9.69 + ? = 100
  10. 10.83 + ? = 100
  11. 11.3 + ? = 10
  12. 12.4 + ? = 10
  13. 13.31 + ? = 100
  14. 14.56 + ? = 100
  15. 15.27 + ? = 100
  16. 16.1 + ? = 10
  17. 17.32 + ? = 100
  18. 18.24 + ? = 100
  19. 19.28 + ? = 100
  20. 20.2 + ? = 10
  21. 21.88 + ? = 100
  22. 22.68 + ? = 100
  23. 23.52 + ? = 100
  24. 24.84 + ? = 100
  25. 25.9 + ? = 10
  26. 26.85 + ? = 100
  27. 27.57 + ? = 100
  28. 28.39 + ? = 100
  29. 29.23 + ? = 100
  30. 30.67 + ? = 100
  31. 31.73 + ? = 100
  32. 32.82 + ? = 100
  33. 33.18 + ? = 100
  34. 34.58 + ? = 100
  35. 35.30 + ? = 100
  36. 36.21 + ? = 100
  37. 37.37 + ? = 100
  38. 38.25 + ? = 100
  39. 39.44 + ? = 100
  40. 40.80 + ? = 100

Answer key

  1. 57
  2. 71
  3. 14
  4. 3
  5. 4
  6. 2
  7. 83
  8. 5
  9. 31
  10. 17
  11. 7
  12. 6
  13. 69
  14. 44
  15. 73
  16. 9
  17. 68
  18. 76
  19. 72
  20. 8
  21. 12
  22. 32
  23. 48
  24. 16
  25. 1
  26. 15
  27. 43
  28. 61
  29. 77
  30. 33
  31. 27
  32. 18
  33. 82
  34. 42
  35. 70
  36. 79
  37. 63
  38. 75
  39. 56
  40. 20

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