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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 133 · 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. 1.49 + 49 =
  2. 2.48 + 22 =
  3. 3.22 + 63 =
  4. 4.24 + 56 =
  5. 5.30 + 22 =
  6. 6.74 + 27 =
  7. 7.30 + 82 =
  8. 8.34 + 71 =
  9. 9.80 + 89 =
  10. 10.36 + 17 =
  11. 11.40 + 44 =
  12. 12.55 + 72 =
  13. 13.72 + 39 =
  14. 14.27 + 33 =
  15. 15.73 + 22 =
  16. 16.21 + 58 =
  17. 17.75 + 25 =
  18. 18.88 + 46 =
  19. 19.21 + 19 =
  20. 20.63 + 66 =
  21. 21.82 + 56 =
  22. 22.57 + 19 =
  23. 23.32 + 67 =
  24. 24.28 + 28 =
  25. 25.21 + 55 =
  26. 26.31 + 61 =
  27. 27.85 + 32 =
  28. 28.82 + 88 =
  29. 29.49 + 39 =
  30. 30.57 + 89 =
  31. 31.69 + 74 =
  32. 32.27 + 74 =
  33. 33.63 + 19 =
  34. 34.50 + 88 =
  35. 35.83 + 48 =
  36. 36.26 + 45 =
  37. 37.41 + 48 =
  38. 38.76 + 45 =
  39. 39.35 + 57 =
  40. 40.75 + 55 =

Answer key

  1. 98
  2. 70
  3. 85
  4. 80
  5. 52
  6. 101
  7. 112
  8. 105
  9. 169
  10. 53
  11. 84
  12. 127
  13. 111
  14. 60
  15. 95
  16. 79
  17. 100
  18. 134
  19. 40
  20. 129
  21. 138
  22. 76
  23. 99
  24. 56
  25. 76
  26. 92
  27. 117
  28. 170
  29. 88
  30. 146
  31. 143
  32. 101
  33. 82
  34. 138
  35. 131
  36. 71
  37. 89
  38. 121
  39. 92
  40. 130

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