← 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 177 · 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. 1.56 + ? = 100
  2. 2.58 + ? = 100
  3. 3.53 + ? = 100
  4. 4.29 + ? = 100
  5. 5.7 + ? = 10
  6. 6.18 + ? = 100
  7. 7.1 + ? = 10
  8. 8.77 + ? = 100
  9. 9.38 + ? = 100
  10. 10.5 + ? = 10
  11. 11.6 + ? = 10
  12. 12.73 + ? = 100
  13. 13.9 + ? = 10
  14. 14.72 + ? = 100
  15. 15.4 + ? = 10
  16. 16.15 + ? = 100
  17. 17.67 + ? = 100
  18. 18.2 + ? = 10
  19. 19.26 + ? = 100
  20. 20.37 + ? = 100
  21. 21.76 + ? = 100
  22. 22.3 + ? = 10
  23. 23.66 + ? = 100
  24. 24.48 + ? = 100
  25. 25.51 + ? = 100
  26. 26.30 + ? = 100
  27. 27.68 + ? = 100
  28. 28.8 + ? = 10
  29. 29.31 + ? = 100
  30. 30.64 + ? = 100
  31. 31.19 + ? = 100
  32. 32.17 + ? = 100
  33. 33.84 + ? = 100
  34. 34.33 + ? = 100
  35. 35.27 + ? = 100
  36. 36.23 + ? = 100
  37. 37.85 + ? = 100
  38. 38.44 + ? = 100
  39. 39.86 + ? = 100
  40. 40.40 + ? = 100

Answer key

  1. 44
  2. 42
  3. 47
  4. 71
  5. 3
  6. 82
  7. 9
  8. 23
  9. 62
  10. 5
  11. 4
  12. 27
  13. 1
  14. 28
  15. 6
  16. 85
  17. 33
  18. 8
  19. 74
  20. 63
  21. 24
  22. 7
  23. 34
  24. 52
  25. 49
  26. 70
  27. 32
  28. 2
  29. 69
  30. 36
  31. 81
  32. 83
  33. 16
  34. 67
  35. 73
  36. 77
  37. 15
  38. 56
  39. 14
  40. 60

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