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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 213 · 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. 1.79 + 52 =
  2. 2.40 + 21 =
  3. 3.88 + 29 =
  4. 4.32 + 21 =
  5. 5.59 + 46 =
  6. 6.66 + 85 =
  7. 7.34 + 69 =
  8. 8.71 + 25 =
  9. 9.66 + 18 =
  10. 10.30 + 76 =
  11. 11.68 + 31 =
  12. 12.60 + 25 =
  13. 13.45 + 16 =
  14. 14.35 + 31 =
  15. 15.85 + 87 =
  16. 16.88 + 35 =
  17. 17.42 + 26 =
  18. 18.53 + 63 =
  19. 19.63 + 81 =
  20. 20.22 + 16 =
  21. 21.71 + 47 =
  22. 22.53 + 29 =
  23. 23.71 + 21 =
  24. 24.25 + 18 =
  25. 25.75 + 24 =
  26. 26.86 + 52 =
  27. 27.52 + 68 =
  28. 28.48 + 12 =
  29. 29.74 + 18 =
  30. 30.89 + 36 =
  31. 31.31 + 67 =
  32. 32.88 + 31 =
  33. 33.45 + 55 =
  34. 34.53 + 23 =
  35. 35.62 + 72 =
  36. 36.87 + 66 =
  37. 37.40 + 64 =
  38. 38.88 + 23 =
  39. 39.31 + 58 =
  40. 40.38 + 21 =

Answer key

  1. 131
  2. 61
  3. 117
  4. 53
  5. 105
  6. 151
  7. 103
  8. 96
  9. 84
  10. 106
  11. 99
  12. 85
  13. 61
  14. 66
  15. 172
  16. 123
  17. 68
  18. 116
  19. 144
  20. 38
  21. 118
  22. 82
  23. 92
  24. 43
  25. 99
  26. 138
  27. 120
  28. 60
  29. 92
  30. 125
  31. 98
  32. 119
  33. 100
  34. 76
  35. 134
  36. 153
  37. 104
  38. 111
  39. 89
  40. 59

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