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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 126 · 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. 1.58 + 46 =
  2. 2.82 + 23 =
  3. 3.34 + 75 =
  4. 4.61 + 83 =
  5. 5.38 + 34 =
  6. 6.67 + 73 =
  7. 7.84 + 35 =
  8. 8.48 + 45 =
  9. 9.24 + 35 =
  10. 10.51 + 34 =
  11. 11.29 + 13 =
  12. 12.50 + 33 =
  13. 13.52 + 35 =
  14. 14.51 + 45 =
  15. 15.84 + 74 =
  16. 16.40 + 83 =
  17. 17.66 + 35 =
  18. 18.75 + 57 =
  19. 19.71 + 69 =
  20. 20.88 + 12 =
  21. 21.54 + 48 =
  22. 22.49 + 83 =
  23. 23.28 + 57 =
  24. 24.62 + 34 =
  25. 25.81 + 75 =
  26. 26.33 + 69 =
  27. 27.80 + 66 =
  28. 28.81 + 42 =
  29. 29.26 + 61 =
  30. 30.26 + 49 =
  31. 31.44 + 79 =
  32. 32.53 + 67 =
  33. 33.25 + 31 =
  34. 34.46 + 48 =
  35. 35.49 + 72 =
  36. 36.59 + 62 =
  37. 37.55 + 44 =
  38. 38.27 + 51 =
  39. 39.53 + 21 =
  40. 40.23 + 71 =

Answer key

  1. 104
  2. 105
  3. 109
  4. 144
  5. 72
  6. 140
  7. 119
  8. 93
  9. 59
  10. 85
  11. 42
  12. 83
  13. 87
  14. 96
  15. 158
  16. 123
  17. 101
  18. 132
  19. 140
  20. 100
  21. 102
  22. 132
  23. 85
  24. 96
  25. 156
  26. 102
  27. 146
  28. 123
  29. 87
  30. 75
  31. 123
  32. 120
  33. 56
  34. 94
  35. 121
  36. 121
  37. 99
  38. 78
  39. 74
  40. 94

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