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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 45 · 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. 1.40 + 63 =
  2. 2.30 + 17 =
  3. 3.24 + 49 =
  4. 4.70 + 51 =
  5. 5.80 + 45 =
  6. 6.40 + 12 =
  7. 7.34 + 83 =
  8. 8.42 + 78 =
  9. 9.28 + 51 =
  10. 10.23 + 74 =
  11. 11.71 + 45 =
  12. 12.53 + 87 =
  13. 13.85 + 68 =
  14. 14.46 + 65 =
  15. 15.24 + 83 =
  16. 16.30 + 81 =
  17. 17.37 + 33 =
  18. 18.44 + 32 =
  19. 19.72 + 66 =
  20. 20.67 + 49 =
  21. 21.37 + 88 =
  22. 22.38 + 23 =
  23. 23.36 + 59 =
  24. 24.79 + 35 =
  25. 25.29 + 78 =
  26. 26.30 + 84 =
  27. 27.26 + 82 =
  28. 28.50 + 47 =
  29. 29.49 + 74 =
  30. 30.25 + 82 =
  31. 31.84 + 13 =
  32. 32.82 + 57 =
  33. 33.23 + 71 =
  34. 34.24 + 51 =
  35. 35.52 + 29 =
  36. 36.70 + 81 =
  37. 37.36 + 56 =
  38. 38.44 + 62 =
  39. 39.31 + 75 =
  40. 40.26 + 16 =

Answer key

  1. 103
  2. 47
  3. 73
  4. 121
  5. 125
  6. 52
  7. 117
  8. 120
  9. 79
  10. 97
  11. 116
  12. 140
  13. 153
  14. 111
  15. 107
  16. 111
  17. 70
  18. 76
  19. 138
  20. 116
  21. 125
  22. 61
  23. 95
  24. 114
  25. 107
  26. 114
  27. 108
  28. 97
  29. 123
  30. 107
  31. 97
  32. 139
  33. 94
  34. 75
  35. 81
  36. 151
  37. 92
  38. 106
  39. 106
  40. 42

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