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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 416 · 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. 1.39 + 49 =
  2. 2.59 + 86 =
  3. 3.27 + 84 =
  4. 4.56 + 62 =
  5. 5.63 + 24 =
  6. 6.21 + 32 =
  7. 7.77 + 67 =
  8. 8.50 + 48 =
  9. 9.34 + 16 =
  10. 10.71 + 66 =
  11. 11.44 + 85 =
  12. 12.50 + 62 =
  13. 13.60 + 75 =
  14. 14.24 + 71 =
  15. 15.63 + 45 =
  16. 16.23 + 74 =
  17. 17.44 + 84 =
  18. 18.64 + 73 =
  19. 19.84 + 34 =
  20. 20.75 + 81 =
  21. 21.41 + 38 =
  22. 22.31 + 73 =
  23. 23.59 + 21 =
  24. 24.46 + 38 =
  25. 25.28 + 78 =
  26. 26.70 + 29 =
  27. 27.23 + 27 =
  28. 28.86 + 84 =
  29. 29.34 + 59 =
  30. 30.67 + 47 =
  31. 31.45 + 69 =
  32. 32.23 + 23 =
  33. 33.83 + 89 =
  34. 34.85 + 55 =
  35. 35.54 + 25 =
  36. 36.29 + 88 =
  37. 37.63 + 57 =
  38. 38.40 + 88 =
  39. 39.50 + 41 =
  40. 40.33 + 21 =

Answer key

  1. 88
  2. 145
  3. 111
  4. 118
  5. 87
  6. 53
  7. 144
  8. 98
  9. 50
  10. 137
  11. 129
  12. 112
  13. 135
  14. 95
  15. 108
  16. 97
  17. 128
  18. 137
  19. 118
  20. 156
  21. 79
  22. 104
  23. 80
  24. 84
  25. 106
  26. 99
  27. 50
  28. 170
  29. 93
  30. 114
  31. 114
  32. 46
  33. 172
  34. 140
  35. 79
  36. 117
  37. 120
  38. 128
  39. 91
  40. 54

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