← 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 672 · 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. 1.6 + ? = 10
  2. 2.26 + ? = 100
  3. 3.19 + ? = 100
  4. 4.25 + ? = 100
  5. 5.3 + ? = 10
  6. 6.69 + ? = 100
  7. 7.57 + ? = 100
  8. 8.4 + ? = 10
  9. 9.5 + ? = 10
  10. 10.86 + ? = 100
  11. 11.55 + ? = 100
  12. 12.1 + ? = 10
  13. 13.21 + ? = 100
  14. 14.32 + ? = 100
  15. 15.46 + ? = 100
  16. 16.9 + ? = 10
  17. 17.7 + ? = 10
  18. 18.37 + ? = 100
  19. 19.27 + ? = 100
  20. 20.85 + ? = 100
  21. 21.43 + ? = 100
  22. 22.8 + ? = 10
  23. 23.17 + ? = 100
  24. 24.20 + ? = 100
  25. 25.44 + ? = 100
  26. 26.81 + ? = 100
  27. 27.73 + ? = 100
  28. 28.64 + ? = 100
  29. 29.38 + ? = 100
  30. 30.2 + ? = 10
  31. 31.49 + ? = 100
  32. 32.33 + ? = 100
  33. 33.28 + ? = 100
  34. 34.15 + ? = 100
  35. 35.88 + ? = 100
  36. 36.36 + ? = 100
  37. 37.53 + ? = 100
  38. 38.75 + ? = 100
  39. 39.50 + ? = 100
  40. 40.63 + ? = 100

Answer key

  1. 4
  2. 74
  3. 81
  4. 75
  5. 7
  6. 31
  7. 43
  8. 6
  9. 5
  10. 14
  11. 45
  12. 9
  13. 79
  14. 68
  15. 54
  16. 1
  17. 3
  18. 63
  19. 73
  20. 15
  21. 57
  22. 2
  23. 83
  24. 80
  25. 56
  26. 19
  27. 27
  28. 36
  29. 62
  30. 8
  31. 51
  32. 67
  33. 72
  34. 85
  35. 12
  36. 64
  37. 47
  38. 25
  39. 50
  40. 37

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