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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 475 · 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. 1.70 + 22 =
  2. 2.75 + 32 =
  3. 3.26 + 13 =
  4. 4.55 + 61 =
  5. 5.42 + 81 =
  6. 6.40 + 78 =
  7. 7.31 + 66 =
  8. 8.42 + 45 =
  9. 9.79 + 31 =
  10. 10.87 + 48 =
  11. 11.34 + 46 =
  12. 12.33 + 16 =
  13. 13.54 + 48 =
  14. 14.88 + 51 =
  15. 15.49 + 89 =
  16. 16.80 + 26 =
  17. 17.62 + 83 =
  18. 18.87 + 89 =
  19. 19.26 + 12 =
  20. 20.37 + 16 =
  21. 21.77 + 61 =
  22. 22.79 + 57 =
  23. 23.74 + 56 =
  24. 24.75 + 21 =
  25. 25.45 + 28 =
  26. 26.84 + 89 =
  27. 27.63 + 78 =
  28. 28.81 + 48 =
  29. 29.74 + 18 =
  30. 30.72 + 37 =
  31. 31.38 + 61 =
  32. 32.86 + 76 =
  33. 33.57 + 28 =
  34. 34.34 + 54 =
  35. 35.81 + 81 =
  36. 36.31 + 89 =
  37. 37.63 + 31 =
  38. 38.55 + 19 =
  39. 39.55 + 76 =
  40. 40.25 + 54 =

Answer key

  1. 92
  2. 107
  3. 39
  4. 116
  5. 123
  6. 118
  7. 97
  8. 87
  9. 110
  10. 135
  11. 80
  12. 49
  13. 102
  14. 139
  15. 138
  16. 106
  17. 145
  18. 176
  19. 38
  20. 53
  21. 138
  22. 136
  23. 130
  24. 96
  25. 73
  26. 173
  27. 141
  28. 129
  29. 92
  30. 109
  31. 99
  32. 162
  33. 85
  34. 88
  35. 162
  36. 120
  37. 94
  38. 74
  39. 131
  40. 79

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