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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 340 · 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. 1.41 + 51 =
  2. 2.22 + 68 =
  3. 3.31 + 22 =
  4. 4.42 + 46 =
  5. 5.75 + 45 =
  6. 6.35 + 45 =
  7. 7.46 + 18 =
  8. 8.52 + 28 =
  9. 9.58 + 64 =
  10. 10.31 + 45 =
  11. 11.34 + 57 =
  12. 12.44 + 14 =
  13. 13.37 + 37 =
  14. 14.60 + 18 =
  15. 15.54 + 41 =
  16. 16.85 + 79 =
  17. 17.40 + 26 =
  18. 18.71 + 89 =
  19. 19.77 + 39 =
  20. 20.53 + 33 =
  21. 21.32 + 27 =
  22. 22.69 + 89 =
  23. 23.23 + 17 =
  24. 24.54 + 44 =
  25. 25.51 + 68 =
  26. 26.82 + 77 =
  27. 27.88 + 71 =
  28. 28.72 + 57 =
  29. 29.30 + 12 =
  30. 30.41 + 27 =
  31. 31.56 + 76 =
  32. 32.34 + 79 =
  33. 33.39 + 81 =
  34. 34.34 + 65 =
  35. 35.51 + 19 =
  36. 36.70 + 65 =
  37. 37.70 + 15 =
  38. 38.42 + 81 =
  39. 39.80 + 83 =
  40. 40.39 + 65 =

Answer key

  1. 92
  2. 90
  3. 53
  4. 88
  5. 120
  6. 80
  7. 64
  8. 80
  9. 122
  10. 76
  11. 91
  12. 58
  13. 74
  14. 78
  15. 95
  16. 164
  17. 66
  18. 160
  19. 116
  20. 86
  21. 59
  22. 158
  23. 40
  24. 98
  25. 119
  26. 159
  27. 159
  28. 129
  29. 42
  30. 68
  31. 132
  32. 113
  33. 120
  34. 99
  35. 70
  36. 135
  37. 85
  38. 123
  39. 163
  40. 104

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