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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 777 · 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. 1.54 + 79 =
  2. 2.84 + 57 =
  3. 3.42 + 69 =
  4. 4.63 + 36 =
  5. 5.49 + 58 =
  6. 6.36 + 75 =
  7. 7.36 + 71 =
  8. 8.88 + 51 =
  9. 9.26 + 73 =
  10. 10.76 + 32 =
  11. 11.21 + 79 =
  12. 12.81 + 43 =
  13. 13.68 + 46 =
  14. 14.42 + 84 =
  15. 15.32 + 18 =
  16. 16.34 + 13 =
  17. 17.79 + 18 =
  18. 18.26 + 31 =
  19. 19.72 + 77 =
  20. 20.46 + 89 =
  21. 21.55 + 81 =
  22. 22.39 + 35 =
  23. 23.28 + 67 =
  24. 24.63 + 49 =
  25. 25.66 + 25 =
  26. 26.79 + 13 =
  27. 27.28 + 29 =
  28. 28.83 + 25 =
  29. 29.81 + 24 =
  30. 30.75 + 28 =
  31. 31.89 + 32 =
  32. 32.57 + 32 =
  33. 33.66 + 51 =
  34. 34.62 + 78 =
  35. 35.57 + 17 =
  36. 36.67 + 76 =
  37. 37.85 + 79 =
  38. 38.33 + 57 =
  39. 39.35 + 23 =
  40. 40.86 + 84 =

Answer key

  1. 133
  2. 141
  3. 111
  4. 99
  5. 107
  6. 111
  7. 107
  8. 139
  9. 99
  10. 108
  11. 100
  12. 124
  13. 114
  14. 126
  15. 50
  16. 47
  17. 97
  18. 57
  19. 149
  20. 135
  21. 136
  22. 74
  23. 95
  24. 112
  25. 91
  26. 92
  27. 57
  28. 108
  29. 105
  30. 103
  31. 121
  32. 89
  33. 117
  34. 140
  35. 74
  36. 143
  37. 164
  38. 90
  39. 58
  40. 170

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