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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 728 · 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. 1.59 + 25 =
  2. 2.38 + 56 =
  3. 3.44 + 15 =
  4. 4.88 + 28 =
  5. 5.86 + 75 =
  6. 6.71 + 48 =
  7. 7.45 + 88 =
  8. 8.75 + 67 =
  9. 9.53 + 22 =
  10. 10.27 + 58 =
  11. 11.29 + 66 =
  12. 12.56 + 43 =
  13. 13.61 + 67 =
  14. 14.26 + 68 =
  15. 15.44 + 45 =
  16. 16.87 + 89 =
  17. 17.47 + 21 =
  18. 18.37 + 64 =
  19. 19.55 + 57 =
  20. 20.38 + 19 =
  21. 21.61 + 66 =
  22. 22.45 + 71 =
  23. 23.77 + 16 =
  24. 24.34 + 81 =
  25. 25.25 + 55 =
  26. 26.40 + 87 =
  27. 27.41 + 18 =
  28. 28.59 + 31 =
  29. 29.26 + 21 =
  30. 30.74 + 36 =
  31. 31.63 + 24 =
  32. 32.32 + 35 =
  33. 33.57 + 75 =
  34. 34.80 + 15 =
  35. 35.81 + 48 =
  36. 36.60 + 87 =
  37. 37.23 + 43 =
  38. 38.24 + 87 =
  39. 39.73 + 29 =
  40. 40.70 + 31 =

Answer key

  1. 84
  2. 94
  3. 59
  4. 116
  5. 161
  6. 119
  7. 133
  8. 142
  9. 75
  10. 85
  11. 95
  12. 99
  13. 128
  14. 94
  15. 89
  16. 176
  17. 68
  18. 101
  19. 112
  20. 57
  21. 127
  22. 116
  23. 93
  24. 115
  25. 80
  26. 127
  27. 59
  28. 90
  29. 47
  30. 110
  31. 87
  32. 67
  33. 132
  34. 95
  35. 129
  36. 147
  37. 66
  38. 111
  39. 102
  40. 101

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