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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 446 · 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. 1.71 + 47 =
  2. 2.62 + 66 =
  3. 3.54 + 19 =
  4. 4.42 + 41 =
  5. 5.56 + 85 =
  6. 6.43 + 35 =
  7. 7.27 + 83 =
  8. 8.78 + 52 =
  9. 9.73 + 31 =
  10. 10.82 + 82 =
  11. 11.28 + 19 =
  12. 12.28 + 88 =
  13. 13.69 + 62 =
  14. 14.30 + 68 =
  15. 15.45 + 23 =
  16. 16.66 + 43 =
  17. 17.69 + 21 =
  18. 18.84 + 71 =
  19. 19.79 + 79 =
  20. 20.76 + 31 =
  21. 21.23 + 35 =
  22. 22.39 + 59 =
  23. 23.63 + 15 =
  24. 24.42 + 82 =
  25. 25.61 + 65 =
  26. 26.51 + 16 =
  27. 27.27 + 78 =
  28. 28.89 + 18 =
  29. 29.45 + 17 =
  30. 30.60 + 85 =
  31. 31.75 + 15 =
  32. 32.71 + 15 =
  33. 33.25 + 81 =
  34. 34.64 + 48 =
  35. 35.25 + 31 =
  36. 36.86 + 15 =
  37. 37.39 + 39 =
  38. 38.68 + 62 =
  39. 39.34 + 29 =
  40. 40.87 + 84 =

Answer key

  1. 118
  2. 128
  3. 73
  4. 83
  5. 141
  6. 78
  7. 110
  8. 130
  9. 104
  10. 164
  11. 47
  12. 116
  13. 131
  14. 98
  15. 68
  16. 109
  17. 90
  18. 155
  19. 158
  20. 107
  21. 58
  22. 98
  23. 78
  24. 124
  25. 126
  26. 67
  27. 105
  28. 107
  29. 62
  30. 145
  31. 90
  32. 86
  33. 106
  34. 112
  35. 56
  36. 101
  37. 78
  38. 130
  39. 63
  40. 171

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