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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 457 · 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. 1.54 + 48 =
  2. 2.74 + 89 =
  3. 3.68 + 25 =
  4. 4.47 + 31 =
  5. 5.89 + 71 =
  6. 6.71 + 47 =
  7. 7.28 + 52 =
  8. 8.74 + 51 =
  9. 9.65 + 81 =
  10. 10.56 + 41 =
  11. 11.86 + 62 =
  12. 12.23 + 77 =
  13. 13.26 + 64 =
  14. 14.47 + 21 =
  15. 15.67 + 72 =
  16. 16.71 + 81 =
  17. 17.29 + 23 =
  18. 18.31 + 72 =
  19. 19.75 + 46 =
  20. 20.50 + 71 =
  21. 21.88 + 21 =
  22. 22.55 + 74 =
  23. 23.24 + 89 =
  24. 24.76 + 31 =
  25. 25.32 + 61 =
  26. 26.43 + 42 =
  27. 27.88 + 59 =
  28. 28.53 + 57 =
  29. 29.72 + 71 =
  30. 30.62 + 57 =
  31. 31.53 + 29 =
  32. 32.51 + 14 =
  33. 33.89 + 89 =
  34. 34.75 + 67 =
  35. 35.78 + 35 =
  36. 36.67 + 26 =
  37. 37.27 + 42 =
  38. 38.52 + 87 =
  39. 39.71 + 68 =
  40. 40.58 + 85 =

Answer key

  1. 102
  2. 163
  3. 93
  4. 78
  5. 160
  6. 118
  7. 80
  8. 125
  9. 146
  10. 97
  11. 148
  12. 100
  13. 90
  14. 68
  15. 139
  16. 152
  17. 52
  18. 103
  19. 121
  20. 121
  21. 109
  22. 129
  23. 113
  24. 107
  25. 93
  26. 85
  27. 147
  28. 110
  29. 143
  30. 119
  31. 82
  32. 65
  33. 178
  34. 142
  35. 113
  36. 93
  37. 69
  38. 139
  39. 139
  40. 143

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