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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 816 · 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 + 88 =
  2. 2.88 + 36 =
  3. 3.54 + 47 =
  4. 4.60 + 65 =
  5. 5.84 + 54 =
  6. 6.74 + 67 =
  7. 7.66 + 73 =
  8. 8.75 + 87 =
  9. 9.22 + 45 =
  10. 10.63 + 66 =
  11. 11.82 + 56 =
  12. 12.28 + 13 =
  13. 13.30 + 69 =
  14. 14.53 + 21 =
  15. 15.49 + 38 =
  16. 16.86 + 58 =
  17. 17.29 + 27 =
  18. 18.88 + 28 =
  19. 19.67 + 17 =
  20. 20.30 + 86 =
  21. 21.44 + 84 =
  22. 22.79 + 61 =
  23. 23.84 + 23 =
  24. 24.48 + 22 =
  25. 25.75 + 28 =
  26. 26.38 + 86 =
  27. 27.81 + 71 =
  28. 28.71 + 71 =
  29. 29.49 + 46 =
  30. 30.21 + 32 =
  31. 31.32 + 73 =
  32. 32.53 + 28 =
  33. 33.86 + 89 =
  34. 34.56 + 57 =
  35. 35.54 + 85 =
  36. 36.21 + 85 =
  37. 37.62 + 62 =
  38. 38.34 + 27 =
  39. 39.36 + 29 =
  40. 40.47 + 85 =

Answer key

  1. 113
  2. 124
  3. 101
  4. 125
  5. 138
  6. 141
  7. 139
  8. 162
  9. 67
  10. 129
  11. 138
  12. 41
  13. 99
  14. 74
  15. 87
  16. 144
  17. 56
  18. 116
  19. 84
  20. 116
  21. 128
  22. 140
  23. 107
  24. 70
  25. 103
  26. 124
  27. 152
  28. 142
  29. 95
  30. 53
  31. 105
  32. 81
  33. 175
  34. 113
  35. 139
  36. 106
  37. 124
  38. 61
  39. 65
  40. 132

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