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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 317 · 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. 1.71 + 38 =
  2. 2.43 + 88 =
  3. 3.63 + 71 =
  4. 4.39 + 32 =
  5. 5.38 + 15 =
  6. 6.22 + 63 =
  7. 7.30 + 71 =
  8. 8.56 + 24 =
  9. 9.89 + 73 =
  10. 10.43 + 38 =
  11. 11.62 + 41 =
  12. 12.70 + 53 =
  13. 13.29 + 51 =
  14. 14.64 + 51 =
  15. 15.53 + 71 =
  16. 16.57 + 68 =
  17. 17.25 + 31 =
  18. 18.46 + 19 =
  19. 19.54 + 22 =
  20. 20.50 + 21 =
  21. 21.55 + 22 =
  22. 22.77 + 75 =
  23. 23.65 + 81 =
  24. 24.58 + 85 =
  25. 25.83 + 79 =
  26. 26.62 + 24 =
  27. 27.27 + 67 =
  28. 28.32 + 34 =
  29. 29.22 + 82 =
  30. 30.85 + 57 =
  31. 31.25 + 51 =
  32. 32.34 + 78 =
  33. 33.67 + 31 =
  34. 34.62 + 53 =
  35. 35.78 + 67 =
  36. 36.76 + 27 =
  37. 37.49 + 79 =
  38. 38.75 + 29 =
  39. 39.40 + 31 =
  40. 40.41 + 71 =

Answer key

  1. 109
  2. 131
  3. 134
  4. 71
  5. 53
  6. 85
  7. 101
  8. 80
  9. 162
  10. 81
  11. 103
  12. 123
  13. 80
  14. 115
  15. 124
  16. 125
  17. 56
  18. 65
  19. 76
  20. 71
  21. 77
  22. 152
  23. 146
  24. 143
  25. 162
  26. 86
  27. 94
  28. 66
  29. 104
  30. 142
  31. 76
  32. 112
  33. 98
  34. 115
  35. 145
  36. 103
  37. 128
  38. 104
  39. 71
  40. 112

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