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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 658 · 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. 1.84 + 42 =
  2. 2.42 + 21 =
  3. 3.52 + 26 =
  4. 4.50 + 61 =
  5. 5.88 + 61 =
  6. 6.53 + 56 =
  7. 7.26 + 12 =
  8. 8.41 + 82 =
  9. 9.61 + 28 =
  10. 10.70 + 62 =
  11. 11.47 + 51 =
  12. 12.81 + 12 =
  13. 13.66 + 25 =
  14. 14.74 + 31 =
  15. 15.26 + 14 =
  16. 16.59 + 31 =
  17. 17.22 + 18 =
  18. 18.64 + 56 =
  19. 19.51 + 18 =
  20. 20.80 + 69 =
  21. 21.55 + 24 =
  22. 22.75 + 59 =
  23. 23.35 + 51 =
  24. 24.83 + 54 =
  25. 25.33 + 58 =
  26. 26.87 + 66 =
  27. 27.79 + 51 =
  28. 28.38 + 41 =
  29. 29.49 + 19 =
  30. 30.76 + 64 =
  31. 31.38 + 76 =
  32. 32.87 + 65 =
  33. 33.41 + 21 =
  34. 34.55 + 13 =
  35. 35.54 + 15 =
  36. 36.84 + 45 =
  37. 37.40 + 35 =
  38. 38.32 + 34 =
  39. 39.44 + 18 =
  40. 40.78 + 46 =

Answer key

  1. 126
  2. 63
  3. 78
  4. 111
  5. 149
  6. 109
  7. 38
  8. 123
  9. 89
  10. 132
  11. 98
  12. 93
  13. 91
  14. 105
  15. 40
  16. 90
  17. 40
  18. 120
  19. 69
  20. 149
  21. 79
  22. 134
  23. 86
  24. 137
  25. 91
  26. 153
  27. 130
  28. 79
  29. 68
  30. 140
  31. 114
  32. 152
  33. 62
  34. 68
  35. 69
  36. 129
  37. 75
  38. 66
  39. 62
  40. 124

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