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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 557 · 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. 1.49 + 45 =
  2. 2.45 + 35 =
  3. 3.56 + 68 =
  4. 4.73 + 89 =
  5. 5.80 + 13 =
  6. 6.84 + 87 =
  7. 7.22 + 78 =
  8. 8.59 + 12 =
  9. 9.52 + 88 =
  10. 10.88 + 36 =
  11. 11.67 + 54 =
  12. 12.49 + 71 =
  13. 13.27 + 81 =
  14. 14.26 + 51 =
  15. 15.36 + 25 =
  16. 16.31 + 87 =
  17. 17.75 + 85 =
  18. 18.71 + 64 =
  19. 19.54 + 51 =
  20. 20.24 + 81 =
  21. 21.78 + 45 =
  22. 22.57 + 13 =
  23. 23.24 + 83 =
  24. 24.55 + 88 =
  25. 25.31 + 56 =
  26. 26.27 + 22 =
  27. 27.87 + 67 =
  28. 28.41 + 62 =
  29. 29.35 + 55 =
  30. 30.71 + 42 =
  31. 31.54 + 41 =
  32. 32.61 + 21 =
  33. 33.29 + 21 =
  34. 34.45 + 51 =
  35. 35.62 + 17 =
  36. 36.72 + 27 =
  37. 37.35 + 54 =
  38. 38.56 + 81 =
  39. 39.70 + 34 =
  40. 40.33 + 77 =

Answer key

  1. 94
  2. 80
  3. 124
  4. 162
  5. 93
  6. 171
  7. 100
  8. 71
  9. 140
  10. 124
  11. 121
  12. 120
  13. 108
  14. 77
  15. 61
  16. 118
  17. 160
  18. 135
  19. 105
  20. 105
  21. 123
  22. 70
  23. 107
  24. 143
  25. 87
  26. 49
  27. 154
  28. 103
  29. 90
  30. 113
  31. 95
  32. 82
  33. 50
  34. 96
  35. 79
  36. 99
  37. 89
  38. 137
  39. 104
  40. 110

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