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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 109 · 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. 1.65 + 66 =
  2. 2.22 + 82 =
  3. 3.62 + 61 =
  4. 4.33 + 17 =
  5. 5.83 + 21 =
  6. 6.60 + 77 =
  7. 7.38 + 78 =
  8. 8.38 + 67 =
  9. 9.68 + 22 =
  10. 10.53 + 32 =
  11. 11.52 + 86 =
  12. 12.61 + 72 =
  13. 13.38 + 54 =
  14. 14.46 + 53 =
  15. 15.51 + 47 =
  16. 16.62 + 13 =
  17. 17.57 + 43 =
  18. 18.53 + 75 =
  19. 19.29 + 57 =
  20. 20.30 + 76 =
  21. 21.70 + 42 =
  22. 22.51 + 82 =
  23. 23.81 + 79 =
  24. 24.62 + 36 =
  25. 25.70 + 34 =
  26. 26.21 + 32 =
  27. 27.62 + 68 =
  28. 28.74 + 21 =
  29. 29.22 + 47 =
  30. 30.88 + 79 =
  31. 31.88 + 17 =
  32. 32.51 + 86 =
  33. 33.32 + 58 =
  34. 34.31 + 73 =
  35. 35.67 + 19 =
  36. 36.23 + 71 =
  37. 37.71 + 29 =
  38. 38.77 + 79 =
  39. 39.49 + 22 =
  40. 40.53 + 29 =

Answer key

  1. 131
  2. 104
  3. 123
  4. 50
  5. 104
  6. 137
  7. 116
  8. 105
  9. 90
  10. 85
  11. 138
  12. 133
  13. 92
  14. 99
  15. 98
  16. 75
  17. 100
  18. 128
  19. 86
  20. 106
  21. 112
  22. 133
  23. 160
  24. 98
  25. 104
  26. 53
  27. 130
  28. 95
  29. 69
  30. 167
  31. 105
  32. 137
  33. 90
  34. 104
  35. 86
  36. 94
  37. 100
  38. 156
  39. 71
  40. 82

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