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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 616 · 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. 1.76 + 26 =
  2. 2.69 + 55 =
  3. 3.56 + 25 =
  4. 4.23 + 81 =
  5. 5.36 + 28 =
  6. 6.59 + 35 =
  7. 7.68 + 32 =
  8. 8.80 + 83 =
  9. 9.85 + 51 =
  10. 10.50 + 41 =
  11. 11.21 + 56 =
  12. 12.21 + 76 =
  13. 13.61 + 38 =
  14. 14.79 + 45 =
  15. 15.83 + 82 =
  16. 16.32 + 51 =
  17. 17.69 + 42 =
  18. 18.79 + 54 =
  19. 19.74 + 53 =
  20. 20.42 + 54 =
  21. 21.63 + 15 =
  22. 22.60 + 74 =
  23. 23.51 + 78 =
  24. 24.21 + 19 =
  25. 25.27 + 87 =
  26. 26.51 + 22 =
  27. 27.62 + 56 =
  28. 28.36 + 34 =
  29. 29.57 + 21 =
  30. 30.55 + 12 =
  31. 31.70 + 18 =
  32. 32.32 + 87 =
  33. 33.32 + 46 =
  34. 34.78 + 74 =
  35. 35.31 + 57 =
  36. 36.86 + 29 =
  37. 37.73 + 24 =
  38. 38.75 + 24 =
  39. 39.23 + 42 =
  40. 40.21 + 87 =

Answer key

  1. 102
  2. 124
  3. 81
  4. 104
  5. 64
  6. 94
  7. 100
  8. 163
  9. 136
  10. 91
  11. 77
  12. 97
  13. 99
  14. 124
  15. 165
  16. 83
  17. 111
  18. 133
  19. 127
  20. 96
  21. 78
  22. 134
  23. 129
  24. 40
  25. 114
  26. 73
  27. 118
  28. 70
  29. 78
  30. 67
  31. 88
  32. 119
  33. 78
  34. 152
  35. 88
  36. 115
  37. 97
  38. 99
  39. 65
  40. 108

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