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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 554 · 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. 1.60 + 44 =
  2. 2.34 + 31 =
  3. 3.40 + 47 =
  4. 4.80 + 15 =
  5. 5.81 + 81 =
  6. 6.86 + 34 =
  7. 7.36 + 31 =
  8. 8.66 + 59 =
  9. 9.85 + 72 =
  10. 10.74 + 35 =
  11. 11.74 + 55 =
  12. 12.77 + 79 =
  13. 13.35 + 21 =
  14. 14.66 + 81 =
  15. 15.76 + 39 =
  16. 16.64 + 41 =
  17. 17.66 + 25 =
  18. 18.46 + 63 =
  19. 19.83 + 16 =
  20. 20.70 + 26 =
  21. 21.83 + 75 =
  22. 22.26 + 82 =
  23. 23.29 + 83 =
  24. 24.74 + 59 =
  25. 25.51 + 77 =
  26. 26.75 + 13 =
  27. 27.35 + 79 =
  28. 28.38 + 31 =
  29. 29.84 + 77 =
  30. 30.25 + 66 =
  31. 31.83 + 34 =
  32. 32.38 + 34 =
  33. 33.55 + 21 =
  34. 34.37 + 32 =
  35. 35.70 + 51 =
  36. 36.80 + 78 =
  37. 37.32 + 46 =
  38. 38.63 + 45 =
  39. 39.82 + 51 =
  40. 40.33 + 32 =

Answer key

  1. 104
  2. 65
  3. 87
  4. 95
  5. 162
  6. 120
  7. 67
  8. 125
  9. 157
  10. 109
  11. 129
  12. 156
  13. 56
  14. 147
  15. 115
  16. 105
  17. 91
  18. 109
  19. 99
  20. 96
  21. 158
  22. 108
  23. 112
  24. 133
  25. 128
  26. 88
  27. 114
  28. 69
  29. 161
  30. 91
  31. 117
  32. 72
  33. 76
  34. 69
  35. 121
  36. 158
  37. 78
  38. 108
  39. 133
  40. 65

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