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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 151 · 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. 1.70 + 72 =
  2. 2.42 + 67 =
  3. 3.23 + 49 =
  4. 4.33 + 75 =
  5. 5.43 + 77 =
  6. 6.64 + 39 =
  7. 7.77 + 26 =
  8. 8.43 + 41 =
  9. 9.49 + 49 =
  10. 10.41 + 26 =
  11. 11.83 + 42 =
  12. 12.68 + 69 =
  13. 13.25 + 56 =
  14. 14.86 + 22 =
  15. 15.65 + 81 =
  16. 16.33 + 57 =
  17. 17.23 + 55 =
  18. 18.64 + 74 =
  19. 19.56 + 22 =
  20. 20.84 + 81 =
  21. 21.51 + 76 =
  22. 22.44 + 67 =
  23. 23.53 + 72 =
  24. 24.45 + 19 =
  25. 25.39 + 26 =
  26. 26.46 + 34 =
  27. 27.21 + 21 =
  28. 28.35 + 28 =
  29. 29.62 + 18 =
  30. 30.80 + 68 =
  31. 31.78 + 37 =
  32. 32.30 + 72 =
  33. 33.69 + 16 =
  34. 34.36 + 53 =
  35. 35.60 + 28 =
  36. 36.39 + 43 =
  37. 37.78 + 51 =
  38. 38.82 + 39 =
  39. 39.36 + 75 =
  40. 40.87 + 49 =

Answer key

  1. 142
  2. 109
  3. 72
  4. 108
  5. 120
  6. 103
  7. 103
  8. 84
  9. 98
  10. 67
  11. 125
  12. 137
  13. 81
  14. 108
  15. 146
  16. 90
  17. 78
  18. 138
  19. 78
  20. 165
  21. 127
  22. 111
  23. 125
  24. 64
  25. 65
  26. 80
  27. 42
  28. 63
  29. 80
  30. 148
  31. 115
  32. 102
  33. 85
  34. 89
  35. 88
  36. 82
  37. 129
  38. 121
  39. 111
  40. 136

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