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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 706 · 40 questions
TalentJR

How to do it in your head (Tens first): Keep the first number as it is. Add the tens of the second number. Add the ones.

NameDateTime takenScore ___ / 40
  1. 1.25 + 48 =
  2. 2.33 + 76 =
  3. 3.44 + 55 =
  4. 4.82 + 57 =
  5. 5.83 + 21 =
  6. 6.85 + 73 =
  7. 7.57 + 19 =
  8. 8.25 + 37 =
  9. 9.88 + 59 =
  10. 10.28 + 86 =
  11. 11.33 + 19 =
  12. 12.71 + 72 =
  13. 13.32 + 33 =
  14. 14.29 + 73 =
  15. 15.68 + 16 =
  16. 16.39 + 71 =
  17. 17.70 + 25 =
  18. 18.89 + 41 =
  19. 19.28 + 21 =
  20. 20.51 + 85 =
  21. 21.54 + 63 =
  22. 22.87 + 81 =
  23. 23.22 + 27 =
  24. 24.35 + 48 =
  25. 25.58 + 82 =
  26. 26.22 + 55 =
  27. 27.43 + 12 =
  28. 28.80 + 15 =
  29. 29.82 + 52 =
  30. 30.23 + 39 =
  31. 31.22 + 85 =
  32. 32.25 + 87 =
  33. 33.70 + 28 =
  34. 34.54 + 76 =
  35. 35.30 + 42 =
  36. 36.74 + 23 =
  37. 37.66 + 29 =
  38. 38.24 + 12 =
  39. 39.46 + 85 =
  40. 40.32 + 71 =

Answer key

  1. 73
  2. 109
  3. 99
  4. 139
  5. 104
  6. 158
  7. 76
  8. 62
  9. 147
  10. 114
  11. 52
  12. 143
  13. 65
  14. 102
  15. 84
  16. 110
  17. 95
  18. 130
  19. 49
  20. 136
  21. 117
  22. 168
  23. 49
  24. 83
  25. 140
  26. 77
  27. 55
  28. 95
  29. 134
  30. 62
  31. 107
  32. 112
  33. 98
  34. 130
  35. 72
  36. 97
  37. 95
  38. 36
  39. 131
  40. 103

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