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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 120 · 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. 1.73 + 19 =
  2. 2.23 + 18 =
  3. 3.77 + 13 =
  4. 4.68 + 29 =
  5. 5.39 + 39 =
  6. 6.87 + 34 =
  7. 7.24 + 48 =
  8. 8.23 + 25 =
  9. 9.52 + 47 =
  10. 10.54 + 66 =
  11. 11.27 + 45 =
  12. 12.63 + 21 =
  13. 13.79 + 81 =
  14. 14.39 + 69 =
  15. 15.61 + 41 =
  16. 16.74 + 31 =
  17. 17.67 + 71 =
  18. 18.65 + 25 =
  19. 19.80 + 29 =
  20. 20.55 + 71 =
  21. 21.64 + 21 =
  22. 22.74 + 51 =
  23. 23.38 + 86 =
  24. 24.38 + 55 =
  25. 25.72 + 53 =
  26. 26.52 + 55 =
  27. 27.79 + 15 =
  28. 28.79 + 67 =
  29. 29.61 + 33 =
  30. 30.26 + 19 =
  31. 31.81 + 88 =
  32. 32.50 + 83 =
  33. 33.63 + 74 =
  34. 34.53 + 16 =
  35. 35.23 + 58 =
  36. 36.51 + 72 =
  37. 37.86 + 39 =
  38. 38.77 + 16 =
  39. 39.30 + 87 =
  40. 40.44 + 21 =

Answer key

  1. 92
  2. 41
  3. 90
  4. 97
  5. 78
  6. 121
  7. 72
  8. 48
  9. 99
  10. 120
  11. 72
  12. 84
  13. 160
  14. 108
  15. 102
  16. 105
  17. 138
  18. 90
  19. 109
  20. 126
  21. 85
  22. 125
  23. 124
  24. 93
  25. 125
  26. 107
  27. 94
  28. 146
  29. 94
  30. 45
  31. 169
  32. 133
  33. 137
  34. 69
  35. 81
  36. 123
  37. 125
  38. 93
  39. 117
  40. 65

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