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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 840 · 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. 1.46 + 24 =
  2. 2.84 + 76 =
  3. 3.82 + 44 =
  4. 4.36 + 71 =
  5. 5.79 + 85 =
  6. 6.36 + 68 =
  7. 7.70 + 77 =
  8. 8.43 + 44 =
  9. 9.48 + 69 =
  10. 10.84 + 88 =
  11. 11.80 + 51 =
  12. 12.67 + 16 =
  13. 13.26 + 36 =
  14. 14.33 + 21 =
  15. 15.37 + 56 =
  16. 16.30 + 37 =
  17. 17.40 + 88 =
  18. 18.39 + 51 =
  19. 19.48 + 22 =
  20. 20.38 + 61 =
  21. 21.27 + 83 =
  22. 22.77 + 31 =
  23. 23.22 + 12 =
  24. 24.66 + 87 =
  25. 25.35 + 35 =
  26. 26.59 + 72 =
  27. 27.50 + 21 =
  28. 28.35 + 17 =
  29. 29.61 + 49 =
  30. 30.65 + 27 =
  31. 31.88 + 25 =
  32. 32.66 + 22 =
  33. 33.87 + 51 =
  34. 34.76 + 26 =
  35. 35.21 + 22 =
  36. 36.81 + 64 =
  37. 37.29 + 62 =
  38. 38.43 + 36 =
  39. 39.62 + 32 =
  40. 40.39 + 56 =

Answer key

  1. 70
  2. 160
  3. 126
  4. 107
  5. 164
  6. 104
  7. 147
  8. 87
  9. 117
  10. 172
  11. 131
  12. 83
  13. 62
  14. 54
  15. 93
  16. 67
  17. 128
  18. 90
  19. 70
  20. 99
  21. 110
  22. 108
  23. 34
  24. 153
  25. 70
  26. 131
  27. 71
  28. 52
  29. 110
  30. 92
  31. 113
  32. 88
  33. 138
  34. 102
  35. 43
  36. 145
  37. 91
  38. 79
  39. 94
  40. 95

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