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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 197 · 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. 1.87 + 41 =
  2. 2.75 + 67 =
  3. 3.35 + 22 =
  4. 4.82 + 78 =
  5. 5.49 + 73 =
  6. 6.36 + 37 =
  7. 7.25 + 82 =
  8. 8.33 + 27 =
  9. 9.70 + 21 =
  10. 10.32 + 21 =
  11. 11.63 + 26 =
  12. 12.59 + 22 =
  13. 13.21 + 86 =
  14. 14.47 + 69 =
  15. 15.81 + 21 =
  16. 16.72 + 34 =
  17. 17.65 + 71 =
  18. 18.44 + 18 =
  19. 19.88 + 32 =
  20. 20.42 + 75 =
  21. 21.43 + 18 =
  22. 22.30 + 68 =
  23. 23.55 + 73 =
  24. 24.30 + 46 =
  25. 25.50 + 53 =
  26. 26.22 + 71 =
  27. 27.31 + 24 =
  28. 28.22 + 44 =
  29. 29.75 + 56 =
  30. 30.68 + 81 =
  31. 31.21 + 31 =
  32. 32.57 + 78 =
  33. 33.80 + 18 =
  34. 34.22 + 66 =
  35. 35.46 + 78 =
  36. 36.21 + 15 =
  37. 37.75 + 78 =
  38. 38.49 + 45 =
  39. 39.80 + 81 =
  40. 40.30 + 82 =

Answer key

  1. 128
  2. 142
  3. 57
  4. 160
  5. 122
  6. 73
  7. 107
  8. 60
  9. 91
  10. 53
  11. 89
  12. 81
  13. 107
  14. 116
  15. 102
  16. 106
  17. 136
  18. 62
  19. 120
  20. 117
  21. 61
  22. 98
  23. 128
  24. 76
  25. 103
  26. 93
  27. 55
  28. 66
  29. 131
  30. 149
  31. 52
  32. 135
  33. 98
  34. 88
  35. 124
  36. 36
  37. 153
  38. 94
  39. 161
  40. 112

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