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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 497 · 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. 1.22 + 77 =
  2. 2.23 + 71 =
  3. 3.60 + 88 =
  4. 4.27 + 59 =
  5. 5.27 + 34 =
  6. 6.58 + 23 =
  7. 7.21 + 76 =
  8. 8.87 + 74 =
  9. 9.36 + 65 =
  10. 10.52 + 86 =
  11. 11.87 + 26 =
  12. 12.70 + 32 =
  13. 13.27 + 49 =
  14. 14.58 + 14 =
  15. 15.80 + 12 =
  16. 16.34 + 18 =
  17. 17.81 + 86 =
  18. 18.24 + 31 =
  19. 19.46 + 74 =
  20. 20.60 + 78 =
  21. 21.45 + 71 =
  22. 22.47 + 27 =
  23. 23.85 + 78 =
  24. 24.66 + 56 =
  25. 25.32 + 45 =
  26. 26.65 + 43 =
  27. 27.88 + 63 =
  28. 28.79 + 32 =
  29. 29.34 + 51 =
  30. 30.42 + 21 =
  31. 31.41 + 21 =
  32. 32.57 + 65 =
  33. 33.24 + 49 =
  34. 34.35 + 14 =
  35. 35.30 + 56 =
  36. 36.28 + 81 =
  37. 37.27 + 51 =
  38. 38.35 + 54 =
  39. 39.66 + 35 =
  40. 40.66 + 24 =

Answer key

  1. 99
  2. 94
  3. 148
  4. 86
  5. 61
  6. 81
  7. 97
  8. 161
  9. 101
  10. 138
  11. 113
  12. 102
  13. 76
  14. 72
  15. 92
  16. 52
  17. 167
  18. 55
  19. 120
  20. 138
  21. 116
  22. 74
  23. 163
  24. 122
  25. 77
  26. 108
  27. 151
  28. 111
  29. 85
  30. 63
  31. 62
  32. 122
  33. 73
  34. 49
  35. 86
  36. 109
  37. 78
  38. 89
  39. 101
  40. 90

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