← 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 399 · 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. 2.5 + ? = 10
  3. 3.72 + ? = 100
  4. 4.85 + ? = 100
  5. 5.16 + ? = 100
  6. 6.6 + ? = 10
  7. 7.37 + ? = 100
  8. 8.67 + ? = 100
  9. 9.4 + ? = 10
  10. 10.11 + ? = 100
  11. 11.7 + ? = 10
  12. 12.41 + ? = 100
  13. 13.8 + ? = 10
  14. 14.1 + ? = 10
  15. 15.74 + ? = 100
  16. 16.28 + ? = 100
  17. 17.17 + ? = 100
  18. 18.61 + ? = 100
  19. 19.30 + ? = 100
  20. 20.77 + ? = 100
  21. 21.47 + ? = 100
  22. 22.20 + ? = 100
  23. 23.57 + ? = 100
  24. 24.34 + ? = 100
  25. 25.44 + ? = 100
  26. 26.40 + ? = 100
  27. 27.31 + ? = 100
  28. 28.32 + ? = 100
  29. 29.3 + ? = 10
  30. 30.81 + ? = 100
  31. 31.80 + ? = 100
  32. 32.53 + ? = 100
  33. 33.88 + ? = 100
  34. 34.21 + ? = 100
  35. 35.46 + ? = 100
  36. 36.15 + ? = 100
  37. 37.27 + ? = 100
  38. 38.89 + ? = 100
  39. 39.9 + ? = 10
  40. 40.33 + ? = 100

Answer key

  1. 8
  2. 5
  3. 28
  4. 15
  5. 84
  6. 4
  7. 63
  8. 33
  9. 6
  10. 89
  11. 3
  12. 59
  13. 2
  14. 9
  15. 26
  16. 72
  17. 83
  18. 39
  19. 70
  20. 23
  21. 53
  22. 80
  23. 43
  24. 66
  25. 56
  26. 60
  27. 69
  28. 68
  29. 7
  30. 19
  31. 20
  32. 47
  33. 12
  34. 79
  35. 54
  36. 85
  37. 73
  38. 11
  39. 1
  40. 67

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