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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 466 · 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. 1.77 + 18 =
  2. 2.35 + 49 =
  3. 3.59 + 45 =
  4. 4.46 + 43 =
  5. 5.46 + 29 =
  6. 6.58 + 56 =
  7. 7.73 + 47 =
  8. 8.56 + 43 =
  9. 9.59 + 84 =
  10. 10.81 + 72 =
  11. 11.48 + 81 =
  12. 12.40 + 51 =
  13. 13.44 + 67 =
  14. 14.66 + 43 =
  15. 15.79 + 41 =
  16. 16.65 + 61 =
  17. 17.71 + 76 =
  18. 18.41 + 17 =
  19. 19.72 + 27 =
  20. 20.81 + 66 =
  21. 21.37 + 61 =
  22. 22.21 + 21 =
  23. 23.72 + 36 =
  24. 24.79 + 49 =
  25. 25.31 + 86 =
  26. 26.37 + 62 =
  27. 27.83 + 22 =
  28. 28.89 + 68 =
  29. 29.55 + 16 =
  30. 30.87 + 49 =
  31. 31.86 + 82 =
  32. 32.26 + 23 =
  33. 33.54 + 22 =
  34. 34.47 + 57 =
  35. 35.70 + 73 =
  36. 36.36 + 23 =
  37. 37.56 + 87 =
  38. 38.81 + 51 =
  39. 39.45 + 69 =
  40. 40.88 + 13 =

Answer key

  1. 95
  2. 84
  3. 104
  4. 89
  5. 75
  6. 114
  7. 120
  8. 99
  9. 143
  10. 153
  11. 129
  12. 91
  13. 111
  14. 109
  15. 120
  16. 126
  17. 147
  18. 58
  19. 99
  20. 147
  21. 98
  22. 42
  23. 108
  24. 128
  25. 117
  26. 99
  27. 105
  28. 157
  29. 71
  30. 136
  31. 168
  32. 49
  33. 76
  34. 104
  35. 143
  36. 59
  37. 143
  38. 132
  39. 114
  40. 101

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