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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 49 · 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. 1.77 + 79 =
  2. 2.69 + 24 =
  3. 3.27 + 38 =
  4. 4.25 + 84 =
  5. 5.86 + 81 =
  6. 6.46 + 72 =
  7. 7.34 + 61 =
  8. 8.52 + 61 =
  9. 9.61 + 77 =
  10. 10.86 + 73 =
  11. 11.25 + 86 =
  12. 12.59 + 75 =
  13. 13.65 + 44 =
  14. 14.38 + 14 =
  15. 15.21 + 81 =
  16. 16.38 + 68 =
  17. 17.37 + 51 =
  18. 18.36 + 28 =
  19. 19.48 + 16 =
  20. 20.52 + 58 =
  21. 21.26 + 61 =
  22. 22.69 + 75 =
  23. 23.81 + 34 =
  24. 24.29 + 18 =
  25. 25.76 + 77 =
  26. 26.77 + 64 =
  27. 27.32 + 72 =
  28. 28.71 + 89 =
  29. 29.59 + 44 =
  30. 30.76 + 55 =
  31. 31.43 + 54 =
  32. 32.44 + 16 =
  33. 33.65 + 19 =
  34. 34.64 + 81 =
  35. 35.38 + 21 =
  36. 36.80 + 35 =
  37. 37.56 + 78 =
  38. 38.50 + 44 =
  39. 39.75 + 45 =
  40. 40.50 + 31 =

Answer key

  1. 156
  2. 93
  3. 65
  4. 109
  5. 167
  6. 118
  7. 95
  8. 113
  9. 138
  10. 159
  11. 111
  12. 134
  13. 109
  14. 52
  15. 102
  16. 106
  17. 88
  18. 64
  19. 64
  20. 110
  21. 87
  22. 144
  23. 115
  24. 47
  25. 153
  26. 141
  27. 104
  28. 160
  29. 103
  30. 131
  31. 97
  32. 60
  33. 84
  34. 145
  35. 59
  36. 115
  37. 134
  38. 94
  39. 120
  40. 81

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