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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 784 · 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. 1.38 + 56 =
  2. 2.85 + 66 =
  3. 3.76 + 31 =
  4. 4.63 + 78 =
  5. 5.87 + 84 =
  6. 6.87 + 28 =
  7. 7.59 + 78 =
  8. 8.40 + 54 =
  9. 9.75 + 81 =
  10. 10.87 + 18 =
  11. 11.52 + 67 =
  12. 12.29 + 81 =
  13. 13.24 + 45 =
  14. 14.45 + 31 =
  15. 15.44 + 65 =
  16. 16.43 + 22 =
  17. 17.46 + 31 =
  18. 18.41 + 45 =
  19. 19.76 + 48 =
  20. 20.21 + 14 =
  21. 21.22 + 16 =
  22. 22.80 + 31 =
  23. 23.42 + 21 =
  24. 24.36 + 13 =
  25. 25.75 + 24 =
  26. 26.24 + 81 =
  27. 27.89 + 21 =
  28. 28.38 + 71 =
  29. 29.88 + 65 =
  30. 30.88 + 85 =
  31. 31.44 + 44 =
  32. 32.23 + 14 =
  33. 33.34 + 24 =
  34. 34.61 + 16 =
  35. 35.68 + 66 =
  36. 36.81 + 55 =
  37. 37.26 + 59 =
  38. 38.58 + 34 =
  39. 39.86 + 23 =
  40. 40.60 + 79 =

Answer key

  1. 94
  2. 151
  3. 107
  4. 141
  5. 171
  6. 115
  7. 137
  8. 94
  9. 156
  10. 105
  11. 119
  12. 110
  13. 69
  14. 76
  15. 109
  16. 65
  17. 77
  18. 86
  19. 124
  20. 35
  21. 38
  22. 111
  23. 63
  24. 49
  25. 99
  26. 105
  27. 110
  28. 109
  29. 153
  30. 173
  31. 88
  32. 37
  33. 58
  34. 77
  35. 134
  36. 136
  37. 85
  38. 92
  39. 109
  40. 139

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