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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 674 · 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. 1.86 + 85 =
  2. 2.67 + 18 =
  3. 3.63 + 34 =
  4. 4.66 + 71 =
  5. 5.23 + 72 =
  6. 6.41 + 41 =
  7. 7.41 + 75 =
  8. 8.23 + 43 =
  9. 9.27 + 43 =
  10. 10.36 + 59 =
  11. 11.22 + 28 =
  12. 12.77 + 71 =
  13. 13.27 + 33 =
  14. 14.36 + 14 =
  15. 15.56 + 41 =
  16. 16.78 + 72 =
  17. 17.32 + 86 =
  18. 18.24 + 14 =
  19. 19.59 + 22 =
  20. 20.28 + 37 =
  21. 21.35 + 29 =
  22. 22.52 + 86 =
  23. 23.32 + 32 =
  24. 24.30 + 29 =
  25. 25.31 + 71 =
  26. 26.78 + 67 =
  27. 27.65 + 64 =
  28. 28.82 + 53 =
  29. 29.28 + 27 =
  30. 30.29 + 14 =
  31. 31.64 + 78 =
  32. 32.71 + 74 =
  33. 33.49 + 41 =
  34. 34.27 + 39 =
  35. 35.74 + 31 =
  36. 36.78 + 64 =
  37. 37.75 + 38 =
  38. 38.34 + 42 =
  39. 39.32 + 37 =
  40. 40.36 + 63 =

Answer key

  1. 171
  2. 85
  3. 97
  4. 137
  5. 95
  6. 82
  7. 116
  8. 66
  9. 70
  10. 95
  11. 50
  12. 148
  13. 60
  14. 50
  15. 97
  16. 150
  17. 118
  18. 38
  19. 81
  20. 65
  21. 64
  22. 138
  23. 64
  24. 59
  25. 102
  26. 145
  27. 129
  28. 135
  29. 55
  30. 43
  31. 142
  32. 145
  33. 90
  34. 66
  35. 105
  36. 142
  37. 113
  38. 76
  39. 69
  40. 99

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