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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 678 · 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. 1.82 + 77 =
  2. 2.58 + 84 =
  3. 3.23 + 13 =
  4. 4.31 + 88 =
  5. 5.61 + 68 =
  6. 6.69 + 61 =
  7. 7.40 + 34 =
  8. 8.54 + 62 =
  9. 9.25 + 25 =
  10. 10.24 + 61 =
  11. 11.61 + 16 =
  12. 12.33 + 59 =
  13. 13.36 + 38 =
  14. 14.86 + 79 =
  15. 15.79 + 77 =
  16. 16.88 + 27 =
  17. 17.55 + 85 =
  18. 18.24 + 35 =
  19. 19.85 + 21 =
  20. 20.58 + 82 =
  21. 21.67 + 26 =
  22. 22.87 + 63 =
  23. 23.48 + 88 =
  24. 24.75 + 14 =
  25. 25.66 + 52 =
  26. 26.23 + 49 =
  27. 27.37 + 82 =
  28. 28.56 + 81 =
  29. 29.71 + 19 =
  30. 30.44 + 69 =
  31. 31.78 + 25 =
  32. 32.29 + 78 =
  33. 33.55 + 61 =
  34. 34.44 + 42 =
  35. 35.22 + 13 =
  36. 36.21 + 58 =
  37. 37.54 + 28 =
  38. 38.48 + 23 =
  39. 39.78 + 58 =
  40. 40.88 + 25 =

Answer key

  1. 159
  2. 142
  3. 36
  4. 119
  5. 129
  6. 130
  7. 74
  8. 116
  9. 50
  10. 85
  11. 77
  12. 92
  13. 74
  14. 165
  15. 156
  16. 115
  17. 140
  18. 59
  19. 106
  20. 140
  21. 93
  22. 150
  23. 136
  24. 89
  25. 118
  26. 72
  27. 119
  28. 137
  29. 90
  30. 113
  31. 103
  32. 107
  33. 116
  34. 86
  35. 35
  36. 79
  37. 82
  38. 71
  39. 136
  40. 113

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