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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 492 · 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. 1.84 + 41 =
  2. 2.47 + 89 =
  3. 3.22 + 83 =
  4. 4.34 + 22 =
  5. 5.52 + 71 =
  6. 6.34 + 53 =
  7. 7.23 + 14 =
  8. 8.68 + 75 =
  9. 9.77 + 53 =
  10. 10.28 + 47 =
  11. 11.28 + 81 =
  12. 12.34 + 64 =
  13. 13.44 + 58 =
  14. 14.22 + 79 =
  15. 15.33 + 69 =
  16. 16.81 + 79 =
  17. 17.51 + 63 =
  18. 18.73 + 89 =
  19. 19.25 + 51 =
  20. 20.24 + 16 =
  21. 21.22 + 14 =
  22. 22.74 + 55 =
  23. 23.73 + 81 =
  24. 24.53 + 79 =
  25. 25.36 + 81 =
  26. 26.48 + 72 =
  27. 27.33 + 87 =
  28. 28.82 + 42 =
  29. 29.66 + 77 =
  30. 30.43 + 21 =
  31. 31.40 + 25 =
  32. 32.53 + 51 =
  33. 33.30 + 74 =
  34. 34.21 + 16 =
  35. 35.29 + 49 =
  36. 36.22 + 35 =
  37. 37.86 + 56 =
  38. 38.51 + 42 =
  39. 39.87 + 28 =
  40. 40.68 + 74 =

Answer key

  1. 125
  2. 136
  3. 105
  4. 56
  5. 123
  6. 87
  7. 37
  8. 143
  9. 130
  10. 75
  11. 109
  12. 98
  13. 102
  14. 101
  15. 102
  16. 160
  17. 114
  18. 162
  19. 76
  20. 40
  21. 36
  22. 129
  23. 154
  24. 132
  25. 117
  26. 120
  27. 120
  28. 124
  29. 143
  30. 64
  31. 65
  32. 104
  33. 104
  34. 37
  35. 78
  36. 57
  37. 142
  38. 93
  39. 115
  40. 142

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