← 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 94 · 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. 1.1 + ? = 10
  2. 2.6 + ? = 10
  3. 3.37 + ? = 100
  4. 4.2 + ? = 10
  5. 5.4 + ? = 10
  6. 6.24 + ? = 100
  7. 7.76 + ? = 100
  8. 8.88 + ? = 100
  9. 9.45 + ? = 100
  10. 10.33 + ? = 100
  11. 11.5 + ? = 10
  12. 12.75 + ? = 100
  13. 13.50 + ? = 100
  14. 14.74 + ? = 100
  15. 15.25 + ? = 100
  16. 16.31 + ? = 100
  17. 17.19 + ? = 100
  18. 18.22 + ? = 100
  19. 19.3 + ? = 10
  20. 20.43 + ? = 100
  21. 21.8 + ? = 10
  22. 22.77 + ? = 100
  23. 23.12 + ? = 100
  24. 24.34 + ? = 100
  25. 25.30 + ? = 100
  26. 26.28 + ? = 100
  27. 27.62 + ? = 100
  28. 28.21 + ? = 100
  29. 29.70 + ? = 100
  30. 30.9 + ? = 10
  31. 31.55 + ? = 100
  32. 32.53 + ? = 100
  33. 33.46 + ? = 100
  34. 34.61 + ? = 100
  35. 35.7 + ? = 10
  36. 36.80 + ? = 100
  37. 37.86 + ? = 100
  38. 38.73 + ? = 100
  39. 39.84 + ? = 100
  40. 40.18 + ? = 100

Answer key

  1. 9
  2. 4
  3. 63
  4. 8
  5. 6
  6. 76
  7. 24
  8. 12
  9. 55
  10. 67
  11. 5
  12. 25
  13. 50
  14. 26
  15. 75
  16. 69
  17. 81
  18. 78
  19. 7
  20. 57
  21. 2
  22. 23
  23. 88
  24. 66
  25. 70
  26. 72
  27. 38
  28. 79
  29. 30
  30. 1
  31. 45
  32. 47
  33. 54
  34. 39
  35. 3
  36. 20
  37. 14
  38. 27
  39. 16
  40. 82

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