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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 779 · 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. 1.64 + 74 =
  2. 2.73 + 16 =
  3. 3.62 + 83 =
  4. 4.89 + 76 =
  5. 5.61 + 81 =
  6. 6.30 + 77 =
  7. 7.87 + 51 =
  8. 8.82 + 61 =
  9. 9.28 + 25 =
  10. 10.71 + 71 =
  11. 11.85 + 14 =
  12. 12.31 + 69 =
  13. 13.46 + 43 =
  14. 14.41 + 74 =
  15. 15.73 + 33 =
  16. 16.54 + 79 =
  17. 17.33 + 21 =
  18. 18.87 + 39 =
  19. 19.40 + 34 =
  20. 20.38 + 61 =
  21. 21.39 + 53 =
  22. 22.22 + 63 =
  23. 23.47 + 15 =
  24. 24.39 + 12 =
  25. 25.48 + 73 =
  26. 26.23 + 48 =
  27. 27.74 + 53 =
  28. 28.23 + 47 =
  29. 29.70 + 44 =
  30. 30.41 + 41 =
  31. 31.27 + 34 =
  32. 32.88 + 44 =
  33. 33.36 + 87 =
  34. 34.53 + 85 =
  35. 35.60 + 72 =
  36. 36.84 + 52 =
  37. 37.84 + 12 =
  38. 38.77 + 49 =
  39. 39.24 + 17 =
  40. 40.59 + 21 =

Answer key

  1. 138
  2. 89
  3. 145
  4. 165
  5. 142
  6. 107
  7. 138
  8. 143
  9. 53
  10. 142
  11. 99
  12. 100
  13. 89
  14. 115
  15. 106
  16. 133
  17. 54
  18. 126
  19. 74
  20. 99
  21. 92
  22. 85
  23. 62
  24. 51
  25. 121
  26. 71
  27. 127
  28. 70
  29. 114
  30. 82
  31. 61
  32. 132
  33. 123
  34. 138
  35. 132
  36. 136
  37. 96
  38. 126
  39. 41
  40. 80

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