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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 609 · 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. 1.22 + 79 =
  2. 2.55 + 41 =
  3. 3.41 + 63 =
  4. 4.39 + 89 =
  5. 5.69 + 22 =
  6. 6.24 + 14 =
  7. 7.68 + 41 =
  8. 8.21 + 81 =
  9. 9.84 + 14 =
  10. 10.74 + 49 =
  11. 11.39 + 48 =
  12. 12.30 + 13 =
  13. 13.85 + 42 =
  14. 14.66 + 63 =
  15. 15.87 + 77 =
  16. 16.32 + 64 =
  17. 17.68 + 75 =
  18. 18.46 + 68 =
  19. 19.34 + 68 =
  20. 20.74 + 15 =
  21. 21.56 + 33 =
  22. 22.36 + 75 =
  23. 23.41 + 25 =
  24. 24.78 + 65 =
  25. 25.78 + 87 =
  26. 26.46 + 14 =
  27. 27.43 + 66 =
  28. 28.81 + 49 =
  29. 29.54 + 13 =
  30. 30.37 + 81 =
  31. 31.44 + 22 =
  32. 32.76 + 71 =
  33. 33.68 + 31 =
  34. 34.55 + 56 =
  35. 35.81 + 69 =
  36. 36.40 + 27 =
  37. 37.50 + 85 =
  38. 38.52 + 81 =
  39. 39.72 + 76 =
  40. 40.55 + 13 =

Answer key

  1. 101
  2. 96
  3. 104
  4. 128
  5. 91
  6. 38
  7. 109
  8. 102
  9. 98
  10. 123
  11. 87
  12. 43
  13. 127
  14. 129
  15. 164
  16. 96
  17. 143
  18. 114
  19. 102
  20. 89
  21. 89
  22. 111
  23. 66
  24. 143
  25. 165
  26. 60
  27. 109
  28. 130
  29. 67
  30. 118
  31. 66
  32. 147
  33. 99
  34. 111
  35. 150
  36. 67
  37. 135
  38. 133
  39. 148
  40. 68

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