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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 271 · 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. 1.60 + 43 =
  2. 2.86 + 48 =
  3. 3.62 + 52 =
  4. 4.88 + 47 =
  5. 5.40 + 73 =
  6. 6.41 + 15 =
  7. 7.84 + 27 =
  8. 8.22 + 81 =
  9. 9.33 + 27 =
  10. 10.73 + 36 =
  11. 11.66 + 28 =
  12. 12.28 + 52 =
  13. 13.78 + 24 =
  14. 14.49 + 73 =
  15. 15.72 + 27 =
  16. 16.79 + 15 =
  17. 17.36 + 38 =
  18. 18.32 + 73 =
  19. 19.30 + 24 =
  20. 20.83 + 35 =
  21. 21.51 + 68 =
  22. 22.55 + 63 =
  23. 23.76 + 17 =
  24. 24.22 + 62 =
  25. 25.69 + 21 =
  26. 26.76 + 18 =
  27. 27.36 + 63 =
  28. 28.86 + 29 =
  29. 29.35 + 25 =
  30. 30.69 + 37 =
  31. 31.76 + 77 =
  32. 32.29 + 16 =
  33. 33.82 + 21 =
  34. 34.31 + 59 =
  35. 35.83 + 21 =
  36. 36.74 + 27 =
  37. 37.82 + 33 =
  38. 38.34 + 41 =
  39. 39.84 + 76 =
  40. 40.82 + 27 =

Answer key

  1. 103
  2. 134
  3. 114
  4. 135
  5. 113
  6. 56
  7. 111
  8. 103
  9. 60
  10. 109
  11. 94
  12. 80
  13. 102
  14. 122
  15. 99
  16. 94
  17. 74
  18. 105
  19. 54
  20. 118
  21. 119
  22. 118
  23. 93
  24. 84
  25. 90
  26. 94
  27. 99
  28. 115
  29. 60
  30. 106
  31. 153
  32. 45
  33. 103
  34. 90
  35. 104
  36. 101
  37. 115
  38. 75
  39. 160
  40. 109

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