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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 311 · 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. 1.74 + 59 =
  2. 2.28 + 36 =
  3. 3.72 + 32 =
  4. 4.54 + 28 =
  5. 5.70 + 42 =
  6. 6.26 + 81 =
  7. 7.82 + 79 =
  8. 8.28 + 71 =
  9. 9.85 + 26 =
  10. 10.66 + 59 =
  11. 11.78 + 88 =
  12. 12.84 + 25 =
  13. 13.30 + 33 =
  14. 14.80 + 41 =
  15. 15.47 + 86 =
  16. 16.56 + 88 =
  17. 17.75 + 13 =
  18. 18.88 + 26 =
  19. 19.36 + 59 =
  20. 20.28 + 39 =
  21. 21.86 + 87 =
  22. 22.35 + 81 =
  23. 23.27 + 77 =
  24. 24.87 + 31 =
  25. 25.55 + 51 =
  26. 26.24 + 26 =
  27. 27.88 + 21 =
  28. 28.73 + 76 =
  29. 29.22 + 51 =
  30. 30.53 + 19 =
  31. 31.63 + 73 =
  32. 32.70 + 57 =
  33. 33.76 + 49 =
  34. 34.58 + 65 =
  35. 35.82 + 21 =
  36. 36.83 + 17 =
  37. 37.82 + 73 =
  38. 38.49 + 23 =
  39. 39.86 + 18 =
  40. 40.39 + 62 =

Answer key

  1. 133
  2. 64
  3. 104
  4. 82
  5. 112
  6. 107
  7. 161
  8. 99
  9. 111
  10. 125
  11. 166
  12. 109
  13. 63
  14. 121
  15. 133
  16. 144
  17. 88
  18. 114
  19. 95
  20. 67
  21. 173
  22. 116
  23. 104
  24. 118
  25. 106
  26. 50
  27. 109
  28. 149
  29. 73
  30. 72
  31. 136
  32. 127
  33. 125
  34. 123
  35. 103
  36. 100
  37. 155
  38. 72
  39. 104
  40. 101

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