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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 292 · 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. 1.55 + 71 =
  2. 2.72 + 31 =
  3. 3.37 + 44 =
  4. 4.67 + 88 =
  5. 5.30 + 54 =
  6. 6.81 + 16 =
  7. 7.27 + 15 =
  8. 8.27 + 69 =
  9. 9.74 + 45 =
  10. 10.29 + 37 =
  11. 11.31 + 64 =
  12. 12.32 + 21 =
  13. 13.89 + 56 =
  14. 14.43 + 35 =
  15. 15.57 + 63 =
  16. 16.59 + 83 =
  17. 17.25 + 52 =
  18. 18.27 + 64 =
  19. 19.62 + 81 =
  20. 20.37 + 81 =
  21. 21.41 + 63 =
  22. 22.61 + 44 =
  23. 23.48 + 36 =
  24. 24.35 + 54 =
  25. 25.33 + 26 =
  26. 26.29 + 13 =
  27. 27.33 + 51 =
  28. 28.21 + 85 =
  29. 29.42 + 83 =
  30. 30.33 + 12 =
  31. 31.67 + 54 =
  32. 32.53 + 87 =
  33. 33.81 + 14 =
  34. 34.41 + 88 =
  35. 35.41 + 57 =
  36. 36.42 + 85 =
  37. 37.85 + 81 =
  38. 38.28 + 84 =
  39. 39.32 + 87 =
  40. 40.29 + 12 =

Answer key

  1. 126
  2. 103
  3. 81
  4. 155
  5. 84
  6. 97
  7. 42
  8. 96
  9. 119
  10. 66
  11. 95
  12. 53
  13. 145
  14. 78
  15. 120
  16. 142
  17. 77
  18. 91
  19. 143
  20. 118
  21. 104
  22. 105
  23. 84
  24. 89
  25. 59
  26. 42
  27. 84
  28. 106
  29. 125
  30. 45
  31. 121
  32. 140
  33. 95
  34. 129
  35. 98
  36. 127
  37. 166
  38. 112
  39. 119
  40. 41

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