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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 407 · 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. 1.22 + 81 =
  2. 2.47 + 68 =
  3. 3.50 + 34 =
  4. 4.29 + 31 =
  5. 5.38 + 51 =
  6. 6.77 + 37 =
  7. 7.32 + 41 =
  8. 8.32 + 58 =
  9. 9.58 + 13 =
  10. 10.27 + 19 =
  11. 11.44 + 27 =
  12. 12.30 + 17 =
  13. 13.85 + 65 =
  14. 14.63 + 83 =
  15. 15.60 + 83 =
  16. 16.59 + 19 =
  17. 17.36 + 71 =
  18. 18.67 + 33 =
  19. 19.36 + 32 =
  20. 20.47 + 52 =
  21. 21.80 + 73 =
  22. 22.80 + 27 =
  23. 23.73 + 52 =
  24. 24.57 + 29 =
  25. 25.75 + 71 =
  26. 26.62 + 48 =
  27. 27.39 + 15 =
  28. 28.68 + 69 =
  29. 29.79 + 81 =
  30. 30.36 + 51 =
  31. 31.67 + 19 =
  32. 32.36 + 75 =
  33. 33.89 + 67 =
  34. 34.55 + 24 =
  35. 35.43 + 32 =
  36. 36.87 + 14 =
  37. 37.69 + 55 =
  38. 38.27 + 81 =
  39. 39.73 + 87 =
  40. 40.78 + 42 =

Answer key

  1. 103
  2. 115
  3. 84
  4. 60
  5. 89
  6. 114
  7. 73
  8. 90
  9. 71
  10. 46
  11. 71
  12. 47
  13. 150
  14. 146
  15. 143
  16. 78
  17. 107
  18. 100
  19. 68
  20. 99
  21. 153
  22. 107
  23. 125
  24. 86
  25. 146
  26. 110
  27. 54
  28. 137
  29. 160
  30. 87
  31. 86
  32. 111
  33. 156
  34. 79
  35. 75
  36. 101
  37. 124
  38. 108
  39. 160
  40. 120

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