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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 268 · 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. 1.52 + 24 =
  2. 2.44 + 12 =
  3. 3.52 + 13 =
  4. 4.60 + 81 =
  5. 5.84 + 78 =
  6. 6.30 + 46 =
  7. 7.62 + 12 =
  8. 8.45 + 67 =
  9. 9.38 + 16 =
  10. 10.68 + 51 =
  11. 11.77 + 85 =
  12. 12.34 + 88 =
  13. 13.78 + 35 =
  14. 14.63 + 19 =
  15. 15.59 + 82 =
  16. 16.42 + 68 =
  17. 17.74 + 51 =
  18. 18.76 + 34 =
  19. 19.22 + 43 =
  20. 20.86 + 26 =
  21. 21.51 + 54 =
  22. 22.61 + 39 =
  23. 23.75 + 17 =
  24. 24.87 + 71 =
  25. 25.61 + 88 =
  26. 26.35 + 27 =
  27. 27.23 + 36 =
  28. 28.49 + 83 =
  29. 29.23 + 23 =
  30. 30.36 + 14 =
  31. 31.66 + 32 =
  32. 32.75 + 18 =
  33. 33.77 + 51 =
  34. 34.79 + 81 =
  35. 35.33 + 54 =
  36. 36.87 + 78 =
  37. 37.67 + 86 =
  38. 38.34 + 41 =
  39. 39.39 + 16 =
  40. 40.81 + 48 =

Answer key

  1. 76
  2. 56
  3. 65
  4. 141
  5. 162
  6. 76
  7. 74
  8. 112
  9. 54
  10. 119
  11. 162
  12. 122
  13. 113
  14. 82
  15. 141
  16. 110
  17. 125
  18. 110
  19. 65
  20. 112
  21. 105
  22. 100
  23. 92
  24. 158
  25. 149
  26. 62
  27. 59
  28. 132
  29. 46
  30. 50
  31. 98
  32. 93
  33. 128
  34. 160
  35. 87
  36. 165
  37. 153
  38. 75
  39. 55
  40. 129

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