← 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 226 · 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. 1.3 + ? = 10
  2. 2.7 + ? = 10
  3. 3.74 + ? = 100
  4. 4.46 + ? = 100
  5. 5.14 + ? = 100
  6. 6.11 + ? = 100
  7. 7.48 + ? = 100
  8. 8.85 + ? = 100
  9. 9.51 + ? = 100
  10. 10.44 + ? = 100
  11. 11.56 + ? = 100
  12. 12.69 + ? = 100
  13. 13.43 + ? = 100
  14. 14.4 + ? = 10
  15. 15.22 + ? = 100
  16. 16.2 + ? = 10
  17. 17.80 + ? = 100
  18. 18.1 + ? = 10
  19. 19.8 + ? = 10
  20. 20.68 + ? = 100
  21. 21.16 + ? = 100
  22. 22.6 + ? = 10
  23. 23.52 + ? = 100
  24. 24.49 + ? = 100
  25. 25.28 + ? = 100
  26. 26.66 + ? = 100
  27. 27.27 + ? = 100
  28. 28.9 + ? = 10
  29. 29.40 + ? = 100
  30. 30.67 + ? = 100
  31. 31.5 + ? = 10
  32. 32.55 + ? = 100
  33. 33.38 + ? = 100
  34. 34.23 + ? = 100
  35. 35.77 + ? = 100
  36. 36.75 + ? = 100
  37. 37.70 + ? = 100
  38. 38.50 + ? = 100
  39. 39.26 + ? = 100
  40. 40.59 + ? = 100

Answer key

  1. 7
  2. 3
  3. 26
  4. 54
  5. 86
  6. 89
  7. 52
  8. 15
  9. 49
  10. 56
  11. 44
  12. 31
  13. 57
  14. 6
  15. 78
  16. 8
  17. 20
  18. 9
  19. 2
  20. 32
  21. 84
  22. 4
  23. 48
  24. 51
  25. 72
  26. 34
  27. 73
  28. 1
  29. 60
  30. 33
  31. 5
  32. 45
  33. 62
  34. 77
  35. 23
  36. 25
  37. 30
  38. 50
  39. 74
  40. 41

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