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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 368 · 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. 1.40 + 78 =
  2. 2.36 + 18 =
  3. 3.24 + 23 =
  4. 4.63 + 38 =
  5. 5.37 + 29 =
  6. 6.68 + 71 =
  7. 7.27 + 17 =
  8. 8.46 + 31 =
  9. 9.28 + 19 =
  10. 10.88 + 21 =
  11. 11.66 + 46 =
  12. 12.37 + 43 =
  13. 13.28 + 81 =
  14. 14.38 + 21 =
  15. 15.61 + 24 =
  16. 16.44 + 12 =
  17. 17.70 + 82 =
  18. 18.49 + 72 =
  19. 19.33 + 28 =
  20. 20.37 + 63 =
  21. 21.81 + 18 =
  22. 22.24 + 15 =
  23. 23.61 + 48 =
  24. 24.44 + 59 =
  25. 25.74 + 85 =
  26. 26.59 + 22 =
  27. 27.47 + 21 =
  28. 28.33 + 46 =
  29. 29.39 + 57 =
  30. 30.22 + 79 =
  31. 31.58 + 46 =
  32. 32.31 + 18 =
  33. 33.48 + 12 =
  34. 34.73 + 79 =
  35. 35.48 + 71 =
  36. 36.35 + 19 =
  37. 37.30 + 43 =
  38. 38.60 + 32 =
  39. 39.33 + 36 =
  40. 40.48 + 27 =

Answer key

  1. 118
  2. 54
  3. 47
  4. 101
  5. 66
  6. 139
  7. 44
  8. 77
  9. 47
  10. 109
  11. 112
  12. 80
  13. 109
  14. 59
  15. 85
  16. 56
  17. 152
  18. 121
  19. 61
  20. 100
  21. 99
  22. 39
  23. 109
  24. 103
  25. 159
  26. 81
  27. 68
  28. 79
  29. 96
  30. 101
  31. 104
  32. 49
  33. 60
  34. 152
  35. 119
  36. 54
  37. 73
  38. 92
  39. 69
  40. 75

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