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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 438 · 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. 1.65 + 75 =
  2. 2.55 + 13 =
  3. 3.74 + 52 =
  4. 4.48 + 61 =
  5. 5.70 + 72 =
  6. 6.34 + 57 =
  7. 7.25 + 19 =
  8. 8.77 + 22 =
  9. 9.50 + 82 =
  10. 10.83 + 24 =
  11. 11.40 + 43 =
  12. 12.27 + 51 =
  13. 13.89 + 89 =
  14. 14.85 + 59 =
  15. 15.62 + 86 =
  16. 16.59 + 89 =
  17. 17.31 + 74 =
  18. 18.50 + 66 =
  19. 19.31 + 51 =
  20. 20.72 + 78 =
  21. 21.72 + 41 =
  22. 22.71 + 33 =
  23. 23.76 + 62 =
  24. 24.41 + 84 =
  25. 25.84 + 77 =
  26. 26.38 + 27 =
  27. 27.78 + 68 =
  28. 28.29 + 89 =
  29. 29.78 + 87 =
  30. 30.28 + 27 =
  31. 31.34 + 71 =
  32. 32.83 + 55 =
  33. 33.43 + 81 =
  34. 34.58 + 52 =
  35. 35.29 + 25 =
  36. 36.66 + 25 =
  37. 37.80 + 53 =
  38. 38.83 + 74 =
  39. 39.52 + 83 =
  40. 40.50 + 56 =

Answer key

  1. 140
  2. 68
  3. 126
  4. 109
  5. 142
  6. 91
  7. 44
  8. 99
  9. 132
  10. 107
  11. 83
  12. 78
  13. 178
  14. 144
  15. 148
  16. 148
  17. 105
  18. 116
  19. 82
  20. 150
  21. 113
  22. 104
  23. 138
  24. 125
  25. 161
  26. 65
  27. 146
  28. 118
  29. 165
  30. 55
  31. 105
  32. 138
  33. 124
  34. 110
  35. 54
  36. 91
  37. 133
  38. 157
  39. 135
  40. 106

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