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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 814 · 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. 1.23 + 16 =
  2. 2.63 + 23 =
  3. 3.70 + 75 =
  4. 4.27 + 79 =
  5. 5.63 + 39 =
  6. 6.78 + 89 =
  7. 7.51 + 67 =
  8. 8.51 + 34 =
  9. 9.43 + 32 =
  10. 10.56 + 86 =
  11. 11.58 + 76 =
  12. 12.70 + 45 =
  13. 13.69 + 35 =
  14. 14.41 + 42 =
  15. 15.59 + 31 =
  16. 16.32 + 17 =
  17. 17.47 + 81 =
  18. 18.82 + 87 =
  19. 19.38 + 47 =
  20. 20.36 + 16 =
  21. 21.85 + 83 =
  22. 22.85 + 27 =
  23. 23.53 + 75 =
  24. 24.42 + 34 =
  25. 25.44 + 28 =
  26. 26.54 + 15 =
  27. 27.53 + 87 =
  28. 28.54 + 43 =
  29. 29.66 + 35 =
  30. 30.89 + 56 =
  31. 31.29 + 74 =
  32. 32.23 + 46 =
  33. 33.40 + 32 =
  34. 34.61 + 37 =
  35. 35.59 + 58 =
  36. 36.57 + 47 =
  37. 37.29 + 21 =
  38. 38.36 + 61 =
  39. 39.43 + 41 =
  40. 40.58 + 71 =

Answer key

  1. 39
  2. 86
  3. 145
  4. 106
  5. 102
  6. 167
  7. 118
  8. 85
  9. 75
  10. 142
  11. 134
  12. 115
  13. 104
  14. 83
  15. 90
  16. 49
  17. 128
  18. 169
  19. 85
  20. 52
  21. 168
  22. 112
  23. 128
  24. 76
  25. 72
  26. 69
  27. 140
  28. 97
  29. 101
  30. 145
  31. 103
  32. 69
  33. 72
  34. 98
  35. 117
  36. 104
  37. 50
  38. 97
  39. 84
  40. 129

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