← 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 321 · 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. 1.85 + ? = 100
  2. 2.8 + ? = 10
  3. 3.2 + ? = 10
  4. 4.34 + ? = 100
  5. 5.74 + ? = 100
  6. 6.25 + ? = 100
  7. 7.57 + ? = 100
  8. 8.5 + ? = 10
  9. 9.29 + ? = 100
  10. 10.16 + ? = 100
  11. 11.4 + ? = 10
  12. 12.47 + ? = 100
  13. 13.33 + ? = 100
  14. 14.28 + ? = 100
  15. 15.14 + ? = 100
  16. 16.31 + ? = 100
  17. 17.3 + ? = 10
  18. 18.11 + ? = 100
  19. 19.19 + ? = 100
  20. 20.56 + ? = 100
  21. 21.6 + ? = 10
  22. 22.81 + ? = 100
  23. 23.9 + ? = 10
  24. 24.50 + ? = 100
  25. 25.1 + ? = 10
  26. 26.88 + ? = 100
  27. 27.86 + ? = 100
  28. 28.68 + ? = 100
  29. 29.45 + ? = 100
  30. 30.62 + ? = 100
  31. 31.76 + ? = 100
  32. 32.23 + ? = 100
  33. 33.66 + ? = 100
  34. 34.70 + ? = 100
  35. 35.7 + ? = 10
  36. 36.75 + ? = 100
  37. 37.12 + ? = 100
  38. 38.72 + ? = 100
  39. 39.20 + ? = 100
  40. 40.27 + ? = 100

Answer key

  1. 15
  2. 2
  3. 8
  4. 66
  5. 26
  6. 75
  7. 43
  8. 5
  9. 71
  10. 84
  11. 6
  12. 53
  13. 67
  14. 72
  15. 86
  16. 69
  17. 7
  18. 89
  19. 81
  20. 44
  21. 4
  22. 19
  23. 1
  24. 50
  25. 9
  26. 12
  27. 14
  28. 32
  29. 55
  30. 38
  31. 24
  32. 77
  33. 34
  34. 30
  35. 3
  36. 25
  37. 88
  38. 28
  39. 80
  40. 73

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