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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 357 · 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. 1.29 + 76 =
  2. 2.41 + 83 =
  3. 3.62 + 38 =
  4. 4.68 + 31 =
  5. 5.73 + 39 =
  6. 6.25 + 42 =
  7. 7.63 + 88 =
  8. 8.23 + 87 =
  9. 9.60 + 37 =
  10. 10.29 + 51 =
  11. 11.32 + 15 =
  12. 12.24 + 83 =
  13. 13.57 + 48 =
  14. 14.26 + 59 =
  15. 15.27 + 48 =
  16. 16.65 + 27 =
  17. 17.79 + 86 =
  18. 18.33 + 75 =
  19. 19.67 + 81 =
  20. 20.64 + 75 =
  21. 21.59 + 17 =
  22. 22.70 + 35 =
  23. 23.66 + 89 =
  24. 24.27 + 63 =
  25. 25.42 + 28 =
  26. 26.49 + 31 =
  27. 27.49 + 78 =
  28. 28.77 + 23 =
  29. 29.84 + 14 =
  30. 30.55 + 79 =
  31. 31.72 + 15 =
  32. 32.72 + 17 =
  33. 33.34 + 62 =
  34. 34.64 + 17 =
  35. 35.56 + 18 =
  36. 36.87 + 56 =
  37. 37.36 + 51 =
  38. 38.53 + 28 =
  39. 39.61 + 63 =
  40. 40.21 + 55 =

Answer key

  1. 105
  2. 124
  3. 100
  4. 99
  5. 112
  6. 67
  7. 151
  8. 110
  9. 97
  10. 80
  11. 47
  12. 107
  13. 105
  14. 85
  15. 75
  16. 92
  17. 165
  18. 108
  19. 148
  20. 139
  21. 76
  22. 105
  23. 155
  24. 90
  25. 70
  26. 80
  27. 127
  28. 100
  29. 98
  30. 134
  31. 87
  32. 89
  33. 96
  34. 81
  35. 74
  36. 143
  37. 87
  38. 81
  39. 124
  40. 76

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