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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 58 · 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. 1.76 + 51 =
  2. 2.74 + 75 =
  3. 3.69 + 77 =
  4. 4.34 + 73 =
  5. 5.53 + 41 =
  6. 6.87 + 13 =
  7. 7.31 + 55 =
  8. 8.55 + 41 =
  9. 9.25 + 27 =
  10. 10.66 + 62 =
  11. 11.83 + 65 =
  12. 12.28 + 76 =
  13. 13.31 + 89 =
  14. 14.79 + 68 =
  15. 15.32 + 72 =
  16. 16.87 + 76 =
  17. 17.42 + 32 =
  18. 18.40 + 53 =
  19. 19.61 + 82 =
  20. 20.37 + 66 =
  21. 21.40 + 83 =
  22. 22.26 + 46 =
  23. 23.45 + 31 =
  24. 24.67 + 89 =
  25. 25.37 + 85 =
  26. 26.33 + 57 =
  27. 27.41 + 59 =
  28. 28.46 + 38 =
  29. 29.83 + 55 =
  30. 30.33 + 65 =
  31. 31.36 + 14 =
  32. 32.79 + 62 =
  33. 33.29 + 27 =
  34. 34.43 + 18 =
  35. 35.64 + 33 =
  36. 36.66 + 51 =
  37. 37.22 + 81 =
  38. 38.54 + 35 =
  39. 39.44 + 14 =
  40. 40.33 + 12 =

Answer key

  1. 127
  2. 149
  3. 146
  4. 107
  5. 94
  6. 100
  7. 86
  8. 96
  9. 52
  10. 128
  11. 148
  12. 104
  13. 120
  14. 147
  15. 104
  16. 163
  17. 74
  18. 93
  19. 143
  20. 103
  21. 123
  22. 72
  23. 76
  24. 156
  25. 122
  26. 90
  27. 100
  28. 84
  29. 138
  30. 98
  31. 50
  32. 141
  33. 56
  34. 61
  35. 97
  36. 117
  37. 103
  38. 89
  39. 58
  40. 45

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