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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 823 · 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. 1.24 + 34 =
  2. 2.59 + 61 =
  3. 3.84 + 18 =
  4. 4.26 + 42 =
  5. 5.84 + 38 =
  6. 6.89 + 83 =
  7. 7.24 + 79 =
  8. 8.56 + 14 =
  9. 9.59 + 28 =
  10. 10.75 + 28 =
  11. 11.62 + 88 =
  12. 12.89 + 55 =
  13. 13.31 + 67 =
  14. 14.54 + 89 =
  15. 15.30 + 65 =
  16. 16.22 + 44 =
  17. 17.80 + 72 =
  18. 18.34 + 69 =
  19. 19.38 + 88 =
  20. 20.52 + 82 =
  21. 21.86 + 64 =
  22. 22.81 + 79 =
  23. 23.74 + 79 =
  24. 24.37 + 34 =
  25. 25.37 + 49 =
  26. 26.50 + 39 =
  27. 27.35 + 21 =
  28. 28.36 + 12 =
  29. 29.65 + 89 =
  30. 30.26 + 31 =
  31. 31.25 + 27 =
  32. 32.43 + 61 =
  33. 33.61 + 18 =
  34. 34.64 + 71 =
  35. 35.81 + 41 =
  36. 36.51 + 73 =
  37. 37.22 + 39 =
  38. 38.54 + 21 =
  39. 39.35 + 42 =
  40. 40.51 + 53 =

Answer key

  1. 58
  2. 120
  3. 102
  4. 68
  5. 122
  6. 172
  7. 103
  8. 70
  9. 87
  10. 103
  11. 150
  12. 144
  13. 98
  14. 143
  15. 95
  16. 66
  17. 152
  18. 103
  19. 126
  20. 134
  21. 150
  22. 160
  23. 153
  24. 71
  25. 86
  26. 89
  27. 56
  28. 48
  29. 154
  30. 57
  31. 52
  32. 104
  33. 79
  34. 135
  35. 122
  36. 124
  37. 61
  38. 75
  39. 77
  40. 104

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