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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 439 · 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. 1.27 + 64 =
  2. 2.76 + 38 =
  3. 3.50 + 81 =
  4. 4.41 + 71 =
  5. 5.25 + 74 =
  6. 6.63 + 64 =
  7. 7.36 + 18 =
  8. 8.72 + 71 =
  9. 9.81 + 85 =
  10. 10.54 + 12 =
  11. 11.72 + 75 =
  12. 12.27 + 71 =
  13. 13.71 + 63 =
  14. 14.82 + 89 =
  15. 15.38 + 54 =
  16. 16.68 + 69 =
  17. 17.76 + 88 =
  18. 18.85 + 75 =
  19. 19.21 + 55 =
  20. 20.86 + 13 =
  21. 21.33 + 16 =
  22. 22.52 + 66 =
  23. 23.77 + 82 =
  24. 24.80 + 65 =
  25. 25.29 + 18 =
  26. 26.56 + 52 =
  27. 27.46 + 34 =
  28. 28.73 + 37 =
  29. 29.21 + 26 =
  30. 30.39 + 33 =
  31. 31.60 + 43 =
  32. 32.36 + 72 =
  33. 33.35 + 21 =
  34. 34.84 + 73 =
  35. 35.85 + 71 =
  36. 36.48 + 88 =
  37. 37.75 + 63 =
  38. 38.46 + 83 =
  39. 39.86 + 35 =
  40. 40.29 + 68 =

Answer key

  1. 91
  2. 114
  3. 131
  4. 112
  5. 99
  6. 127
  7. 54
  8. 143
  9. 166
  10. 66
  11. 147
  12. 98
  13. 134
  14. 171
  15. 92
  16. 137
  17. 164
  18. 160
  19. 76
  20. 99
  21. 49
  22. 118
  23. 159
  24. 145
  25. 47
  26. 108
  27. 80
  28. 110
  29. 47
  30. 72
  31. 103
  32. 108
  33. 56
  34. 157
  35. 156
  36. 136
  37. 138
  38. 129
  39. 121
  40. 97

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