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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 260 · 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. 1.58 + 21 =
  2. 2.23 + 81 =
  3. 3.28 + 78 =
  4. 4.43 + 81 =
  5. 5.37 + 37 =
  6. 6.80 + 47 =
  7. 7.67 + 54 =
  8. 8.58 + 66 =
  9. 9.48 + 24 =
  10. 10.45 + 65 =
  11. 11.56 + 59 =
  12. 12.86 + 35 =
  13. 13.28 + 63 =
  14. 14.38 + 19 =
  15. 15.43 + 61 =
  16. 16.22 + 47 =
  17. 17.31 + 85 =
  18. 18.37 + 81 =
  19. 19.59 + 79 =
  20. 20.65 + 16 =
  21. 21.48 + 28 =
  22. 22.45 + 58 =
  23. 23.54 + 35 =
  24. 24.23 + 17 =
  25. 25.38 + 54 =
  26. 26.89 + 85 =
  27. 27.84 + 31 =
  28. 28.45 + 14 =
  29. 29.26 + 14 =
  30. 30.87 + 52 =
  31. 31.48 + 58 =
  32. 32.57 + 12 =
  33. 33.89 + 51 =
  34. 34.24 + 84 =
  35. 35.80 + 69 =
  36. 36.52 + 18 =
  37. 37.70 + 12 =
  38. 38.48 + 29 =
  39. 39.78 + 41 =
  40. 40.75 + 33 =

Answer key

  1. 79
  2. 104
  3. 106
  4. 124
  5. 74
  6. 127
  7. 121
  8. 124
  9. 72
  10. 110
  11. 115
  12. 121
  13. 91
  14. 57
  15. 104
  16. 69
  17. 116
  18. 118
  19. 138
  20. 81
  21. 76
  22. 103
  23. 89
  24. 40
  25. 92
  26. 174
  27. 115
  28. 59
  29. 40
  30. 139
  31. 106
  32. 69
  33. 140
  34. 108
  35. 149
  36. 70
  37. 82
  38. 77
  39. 119
  40. 108

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