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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 288 · 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. 1.59 + 43 =
  2. 2.81 + 62 =
  3. 3.39 + 61 =
  4. 4.81 + 33 =
  5. 5.57 + 39 =
  6. 6.83 + 89 =
  7. 7.22 + 71 =
  8. 8.58 + 57 =
  9. 9.26 + 31 =
  10. 10.30 + 46 =
  11. 11.83 + 51 =
  12. 12.68 + 55 =
  13. 13.57 + 51 =
  14. 14.29 + 22 =
  15. 15.78 + 71 =
  16. 16.36 + 68 =
  17. 17.59 + 33 =
  18. 18.53 + 77 =
  19. 19.21 + 13 =
  20. 20.23 + 35 =
  21. 21.33 + 51 =
  22. 22.37 + 61 =
  23. 23.33 + 13 =
  24. 24.61 + 71 =
  25. 25.81 + 77 =
  26. 26.24 + 28 =
  27. 27.39 + 34 =
  28. 28.39 + 68 =
  29. 29.43 + 68 =
  30. 30.88 + 47 =
  31. 31.47 + 29 =
  32. 32.30 + 71 =
  33. 33.78 + 17 =
  34. 34.25 + 71 =
  35. 35.56 + 31 =
  36. 36.26 + 21 =
  37. 37.75 + 23 =
  38. 38.25 + 78 =
  39. 39.40 + 46 =
  40. 40.70 + 37 =

Answer key

  1. 102
  2. 143
  3. 100
  4. 114
  5. 96
  6. 172
  7. 93
  8. 115
  9. 57
  10. 76
  11. 134
  12. 123
  13. 108
  14. 51
  15. 149
  16. 104
  17. 92
  18. 130
  19. 34
  20. 58
  21. 84
  22. 98
  23. 46
  24. 132
  25. 158
  26. 52
  27. 73
  28. 107
  29. 111
  30. 135
  31. 76
  32. 101
  33. 95
  34. 96
  35. 87
  36. 47
  37. 98
  38. 103
  39. 86
  40. 107

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