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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 774 · 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. 1.74 + 34 =
  2. 2.30 + 15 =
  3. 3.85 + 89 =
  4. 4.51 + 72 =
  5. 5.22 + 14 =
  6. 6.84 + 51 =
  7. 7.21 + 73 =
  8. 8.22 + 66 =
  9. 9.23 + 61 =
  10. 10.74 + 86 =
  11. 11.75 + 25 =
  12. 12.25 + 59 =
  13. 13.86 + 59 =
  14. 14.49 + 14 =
  15. 15.61 + 78 =
  16. 16.50 + 23 =
  17. 17.35 + 31 =
  18. 18.34 + 74 =
  19. 19.51 + 81 =
  20. 20.87 + 74 =
  21. 21.88 + 44 =
  22. 22.22 + 31 =
  23. 23.82 + 22 =
  24. 24.74 + 89 =
  25. 25.55 + 31 =
  26. 26.71 + 49 =
  27. 27.83 + 56 =
  28. 28.28 + 36 =
  29. 29.38 + 78 =
  30. 30.58 + 44 =
  31. 31.32 + 68 =
  32. 32.86 + 43 =
  33. 33.37 + 61 =
  34. 34.88 + 71 =
  35. 35.78 + 25 =
  36. 36.44 + 19 =
  37. 37.84 + 86 =
  38. 38.81 + 84 =
  39. 39.79 + 45 =
  40. 40.36 + 83 =

Answer key

  1. 108
  2. 45
  3. 174
  4. 123
  5. 36
  6. 135
  7. 94
  8. 88
  9. 84
  10. 160
  11. 100
  12. 84
  13. 145
  14. 63
  15. 139
  16. 73
  17. 66
  18. 108
  19. 132
  20. 161
  21. 132
  22. 53
  23. 104
  24. 163
  25. 86
  26. 120
  27. 139
  28. 64
  29. 116
  30. 102
  31. 100
  32. 129
  33. 98
  34. 159
  35. 103
  36. 63
  37. 170
  38. 165
  39. 124
  40. 119

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