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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 452 · 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. 1.76 + 79 =
  2. 2.43 + 24 =
  3. 3.66 + 53 =
  4. 4.87 + 52 =
  5. 5.25 + 24 =
  6. 6.25 + 27 =
  7. 7.35 + 43 =
  8. 8.76 + 44 =
  9. 9.87 + 47 =
  10. 10.75 + 49 =
  11. 11.79 + 71 =
  12. 12.52 + 47 =
  13. 13.85 + 54 =
  14. 14.26 + 28 =
  15. 15.74 + 71 =
  16. 16.24 + 83 =
  17. 17.46 + 64 =
  18. 18.65 + 88 =
  19. 19.80 + 42 =
  20. 20.43 + 81 =
  21. 21.35 + 54 =
  22. 22.42 + 52 =
  23. 23.47 + 66 =
  24. 24.88 + 85 =
  25. 25.30 + 19 =
  26. 26.49 + 23 =
  27. 27.50 + 37 =
  28. 28.40 + 45 =
  29. 29.41 + 51 =
  30. 30.71 + 38 =
  31. 31.69 + 41 =
  32. 32.62 + 27 =
  33. 33.84 + 71 =
  34. 34.77 + 26 =
  35. 35.83 + 65 =
  36. 36.61 + 21 =
  37. 37.22 + 56 =
  38. 38.21 + 28 =
  39. 39.43 + 21 =
  40. 40.83 + 22 =

Answer key

  1. 155
  2. 67
  3. 119
  4. 139
  5. 49
  6. 52
  7. 78
  8. 120
  9. 134
  10. 124
  11. 150
  12. 99
  13. 139
  14. 54
  15. 145
  16. 107
  17. 110
  18. 153
  19. 122
  20. 124
  21. 89
  22. 94
  23. 113
  24. 173
  25. 49
  26. 72
  27. 87
  28. 85
  29. 92
  30. 109
  31. 110
  32. 89
  33. 155
  34. 103
  35. 148
  36. 82
  37. 78
  38. 49
  39. 64
  40. 105

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