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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 831 · 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 + 87 =
  2. 2.32 + 81 =
  3. 3.35 + 28 =
  4. 4.76 + 67 =
  5. 5.50 + 19 =
  6. 6.73 + 65 =
  7. 7.74 + 31 =
  8. 8.28 + 64 =
  9. 9.85 + 51 =
  10. 10.75 + 64 =
  11. 11.46 + 81 =
  12. 12.44 + 28 =
  13. 13.75 + 26 =
  14. 14.21 + 56 =
  15. 15.81 + 36 =
  16. 16.35 + 89 =
  17. 17.27 + 35 =
  18. 18.86 + 52 =
  19. 19.25 + 82 =
  20. 20.38 + 88 =
  21. 21.43 + 23 =
  22. 22.29 + 71 =
  23. 23.55 + 59 =
  24. 24.51 + 48 =
  25. 25.63 + 34 =
  26. 26.33 + 22 =
  27. 27.24 + 43 =
  28. 28.76 + 76 =
  29. 29.40 + 34 =
  30. 30.37 + 38 =
  31. 31.21 + 18 =
  32. 32.43 + 14 =
  33. 33.74 + 83 =
  34. 34.71 + 31 =
  35. 35.65 + 75 =
  36. 36.75 + 34 =
  37. 37.30 + 81 =
  38. 38.21 + 32 =
  39. 39.73 + 17 =
  40. 40.68 + 57 =

Answer key

  1. 173
  2. 113
  3. 63
  4. 143
  5. 69
  6. 138
  7. 105
  8. 92
  9. 136
  10. 139
  11. 127
  12. 72
  13. 101
  14. 77
  15. 117
  16. 124
  17. 62
  18. 138
  19. 107
  20. 126
  21. 66
  22. 100
  23. 114
  24. 99
  25. 97
  26. 55
  27. 67
  28. 152
  29. 74
  30. 75
  31. 39
  32. 57
  33. 157
  34. 102
  35. 140
  36. 109
  37. 111
  38. 53
  39. 90
  40. 125

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