← 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 831 · 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. 1.7 + ? = 10
  2. 2.4 + ? = 10
  3. 3.5 + ? = 10
  4. 4.44 + ? = 100
  5. 5.6 + ? = 10
  6. 6.12 + ? = 100
  7. 7.56 + ? = 100
  8. 8.2 + ? = 10
  9. 9.33 + ? = 100
  10. 10.15 + ? = 100
  11. 11.20 + ? = 100
  12. 12.81 + ? = 100
  13. 13.9 + ? = 10
  14. 14.89 + ? = 100
  15. 15.80 + ? = 100
  16. 16.1 + ? = 10
  17. 17.52 + ? = 100
  18. 18.8 + ? = 10
  19. 19.28 + ? = 100
  20. 20.3 + ? = 10
  21. 21.74 + ? = 100
  22. 22.22 + ? = 100
  23. 23.63 + ? = 100
  24. 24.73 + ? = 100
  25. 25.14 + ? = 100
  26. 26.19 + ? = 100
  27. 27.79 + ? = 100
  28. 28.86 + ? = 100
  29. 29.64 + ? = 100
  30. 30.48 + ? = 100
  31. 31.57 + ? = 100
  32. 32.60 + ? = 100
  33. 33.84 + ? = 100
  34. 34.85 + ? = 100
  35. 35.38 + ? = 100
  36. 36.88 + ? = 100
  37. 37.24 + ? = 100
  38. 38.65 + ? = 100
  39. 39.69 + ? = 100
  40. 40.82 + ? = 100

Answer key

  1. 3
  2. 6
  3. 5
  4. 56
  5. 4
  6. 88
  7. 44
  8. 8
  9. 67
  10. 85
  11. 80
  12. 19
  13. 1
  14. 11
  15. 20
  16. 9
  17. 48
  18. 2
  19. 72
  20. 7
  21. 26
  22. 78
  23. 37
  24. 27
  25. 86
  26. 81
  27. 21
  28. 14
  29. 36
  30. 52
  31. 43
  32. 40
  33. 16
  34. 15
  35. 62
  36. 12
  37. 76
  38. 35
  39. 31
  40. 18

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