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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 285 · 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. 1.67 + 16 =
  2. 2.64 + 41 =
  3. 3.71 + 82 =
  4. 4.33 + 58 =
  5. 5.21 + 53 =
  6. 6.44 + 62 =
  7. 7.70 + 86 =
  8. 8.69 + 46 =
  9. 9.40 + 45 =
  10. 10.61 + 75 =
  11. 11.39 + 33 =
  12. 12.50 + 84 =
  13. 13.57 + 18 =
  14. 14.81 + 84 =
  15. 15.52 + 56 =
  16. 16.44 + 72 =
  17. 17.42 + 12 =
  18. 18.29 + 79 =
  19. 19.85 + 32 =
  20. 20.68 + 62 =
  21. 21.59 + 87 =
  22. 22.66 + 31 =
  23. 23.57 + 31 =
  24. 24.63 + 53 =
  25. 25.79 + 19 =
  26. 26.40 + 14 =
  27. 27.53 + 25 =
  28. 28.37 + 35 =
  29. 29.67 + 15 =
  30. 30.31 + 72 =
  31. 31.77 + 16 =
  32. 32.66 + 46 =
  33. 33.44 + 36 =
  34. 34.26 + 76 =
  35. 35.41 + 69 =
  36. 36.21 + 81 =
  37. 37.30 + 89 =
  38. 38.88 + 48 =
  39. 39.67 + 71 =
  40. 40.28 + 77 =

Answer key

  1. 83
  2. 105
  3. 153
  4. 91
  5. 74
  6. 106
  7. 156
  8. 115
  9. 85
  10. 136
  11. 72
  12. 134
  13. 75
  14. 165
  15. 108
  16. 116
  17. 54
  18. 108
  19. 117
  20. 130
  21. 146
  22. 97
  23. 88
  24. 116
  25. 98
  26. 54
  27. 78
  28. 72
  29. 82
  30. 103
  31. 93
  32. 112
  33. 80
  34. 102
  35. 110
  36. 102
  37. 119
  38. 136
  39. 138
  40. 105

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