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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 270 · 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. 1.79 + 28 =
  2. 2.63 + 23 =
  3. 3.86 + 35 =
  4. 4.29 + 81 =
  5. 5.33 + 68 =
  6. 6.46 + 28 =
  7. 7.31 + 12 =
  8. 8.24 + 31 =
  9. 9.68 + 32 =
  10. 10.37 + 45 =
  11. 11.48 + 58 =
  12. 12.58 + 47 =
  13. 13.39 + 71 =
  14. 14.67 + 39 =
  15. 15.58 + 51 =
  16. 16.60 + 45 =
  17. 17.55 + 44 =
  18. 18.21 + 52 =
  19. 19.41 + 85 =
  20. 20.87 + 22 =
  21. 21.36 + 31 =
  22. 22.85 + 17 =
  23. 23.78 + 35 =
  24. 24.51 + 53 =
  25. 25.89 + 73 =
  26. 26.88 + 31 =
  27. 27.40 + 84 =
  28. 28.31 + 31 =
  29. 29.70 + 81 =
  30. 30.42 + 74 =
  31. 31.41 + 64 =
  32. 32.85 + 81 =
  33. 33.34 + 14 =
  34. 34.72 + 51 =
  35. 35.66 + 89 =
  36. 36.38 + 82 =
  37. 37.23 + 48 =
  38. 38.62 + 72 =
  39. 39.51 + 66 =
  40. 40.41 + 62 =

Answer key

  1. 107
  2. 86
  3. 121
  4. 110
  5. 101
  6. 74
  7. 43
  8. 55
  9. 100
  10. 82
  11. 106
  12. 105
  13. 110
  14. 106
  15. 109
  16. 105
  17. 99
  18. 73
  19. 126
  20. 109
  21. 67
  22. 102
  23. 113
  24. 104
  25. 162
  26. 119
  27. 124
  28. 62
  29. 151
  30. 116
  31. 105
  32. 166
  33. 48
  34. 123
  35. 155
  36. 120
  37. 71
  38. 134
  39. 117
  40. 103

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