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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 326 · 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. 1.87 + 82 =
  2. 2.67 + 31 =
  3. 3.39 + 48 =
  4. 4.70 + 81 =
  5. 5.87 + 25 =
  6. 6.61 + 21 =
  7. 7.42 + 39 =
  8. 8.51 + 21 =
  9. 9.44 + 26 =
  10. 10.71 + 71 =
  11. 11.74 + 64 =
  12. 12.21 + 13 =
  13. 13.73 + 48 =
  14. 14.69 + 88 =
  15. 15.54 + 29 =
  16. 16.22 + 68 =
  17. 17.65 + 24 =
  18. 18.82 + 64 =
  19. 19.86 + 63 =
  20. 20.52 + 67 =
  21. 21.21 + 74 =
  22. 22.51 + 87 =
  23. 23.76 + 67 =
  24. 24.60 + 88 =
  25. 25.41 + 73 =
  26. 26.50 + 34 =
  27. 27.81 + 76 =
  28. 28.59 + 21 =
  29. 29.61 + 24 =
  30. 30.39 + 72 =
  31. 31.42 + 38 =
  32. 32.67 + 87 =
  33. 33.36 + 48 =
  34. 34.26 + 49 =
  35. 35.80 + 38 =
  36. 36.46 + 33 =
  37. 37.25 + 67 =
  38. 38.68 + 55 =
  39. 39.73 + 76 =
  40. 40.80 + 29 =

Answer key

  1. 169
  2. 98
  3. 87
  4. 151
  5. 112
  6. 82
  7. 81
  8. 72
  9. 70
  10. 142
  11. 138
  12. 34
  13. 121
  14. 157
  15. 83
  16. 90
  17. 89
  18. 146
  19. 149
  20. 119
  21. 95
  22. 138
  23. 143
  24. 148
  25. 114
  26. 84
  27. 157
  28. 80
  29. 85
  30. 111
  31. 80
  32. 154
  33. 84
  34. 75
  35. 118
  36. 79
  37. 92
  38. 123
  39. 149
  40. 109

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