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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 160 · 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. 1.69 + 42 =
  2. 2.39 + 71 =
  3. 3.56 + 62 =
  4. 4.42 + 33 =
  5. 5.24 + 18 =
  6. 6.80 + 31 =
  7. 7.62 + 83 =
  8. 8.81 + 31 =
  9. 9.62 + 44 =
  10. 10.31 + 25 =
  11. 11.72 + 72 =
  12. 12.70 + 21 =
  13. 13.54 + 24 =
  14. 14.51 + 75 =
  15. 15.78 + 22 =
  16. 16.26 + 89 =
  17. 17.49 + 55 =
  18. 18.25 + 21 =
  19. 19.59 + 36 =
  20. 20.51 + 44 =
  21. 21.89 + 81 =
  22. 22.72 + 28 =
  23. 23.44 + 59 =
  24. 24.45 + 38 =
  25. 25.30 + 14 =
  26. 26.71 + 24 =
  27. 27.82 + 71 =
  28. 28.29 + 22 =
  29. 29.40 + 56 =
  30. 30.30 + 84 =
  31. 31.55 + 25 =
  32. 32.64 + 68 =
  33. 33.68 + 36 =
  34. 34.85 + 46 =
  35. 35.31 + 48 =
  36. 36.85 + 27 =
  37. 37.70 + 81 =
  38. 38.36 + 21 =
  39. 39.71 + 83 =
  40. 40.27 + 65 =

Answer key

  1. 111
  2. 110
  3. 118
  4. 75
  5. 42
  6. 111
  7. 145
  8. 112
  9. 106
  10. 56
  11. 144
  12. 91
  13. 78
  14. 126
  15. 100
  16. 115
  17. 104
  18. 46
  19. 95
  20. 95
  21. 170
  22. 100
  23. 103
  24. 83
  25. 44
  26. 95
  27. 153
  28. 51
  29. 96
  30. 114
  31. 80
  32. 132
  33. 104
  34. 131
  35. 79
  36. 112
  37. 151
  38. 57
  39. 154
  40. 92

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