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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 822 · 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. 1.24 + 55 =
  2. 2.73 + 83 =
  3. 3.80 + 46 =
  4. 4.72 + 67 =
  5. 5.43 + 31 =
  6. 6.61 + 16 =
  7. 7.44 + 29 =
  8. 8.55 + 41 =
  9. 9.29 + 37 =
  10. 10.67 + 17 =
  11. 11.50 + 77 =
  12. 12.41 + 84 =
  13. 13.64 + 23 =
  14. 14.39 + 25 =
  15. 15.38 + 87 =
  16. 16.63 + 51 =
  17. 17.32 + 34 =
  18. 18.79 + 39 =
  19. 19.46 + 29 =
  20. 20.44 + 85 =
  21. 21.41 + 24 =
  22. 22.80 + 27 =
  23. 23.68 + 88 =
  24. 24.59 + 37 =
  25. 25.61 + 23 =
  26. 26.80 + 17 =
  27. 27.83 + 41 =
  28. 28.71 + 88 =
  29. 29.32 + 85 =
  30. 30.82 + 48 =
  31. 31.36 + 56 =
  32. 32.89 + 51 =
  33. 33.41 + 27 =
  34. 34.45 + 21 =
  35. 35.62 + 54 =
  36. 36.48 + 36 =
  37. 37.41 + 89 =
  38. 38.58 + 16 =
  39. 39.36 + 66 =
  40. 40.27 + 72 =

Answer key

  1. 79
  2. 156
  3. 126
  4. 139
  5. 74
  6. 77
  7. 73
  8. 96
  9. 66
  10. 84
  11. 127
  12. 125
  13. 87
  14. 64
  15. 125
  16. 114
  17. 66
  18. 118
  19. 75
  20. 129
  21. 65
  22. 107
  23. 156
  24. 96
  25. 84
  26. 97
  27. 124
  28. 159
  29. 117
  30. 130
  31. 92
  32. 140
  33. 68
  34. 66
  35. 116
  36. 84
  37. 130
  38. 74
  39. 102
  40. 99

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