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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 304 · 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. 1.47 + 67 =
  2. 2.39 + 41 =
  3. 3.40 + 13 =
  4. 4.79 + 76 =
  5. 5.45 + 33 =
  6. 6.80 + 34 =
  7. 7.34 + 75 =
  8. 8.66 + 22 =
  9. 9.54 + 79 =
  10. 10.31 + 59 =
  11. 11.64 + 26 =
  12. 12.81 + 81 =
  13. 13.33 + 85 =
  14. 14.35 + 81 =
  15. 15.50 + 29 =
  16. 16.78 + 61 =
  17. 17.77 + 69 =
  18. 18.48 + 56 =
  19. 19.83 + 62 =
  20. 20.36 + 38 =
  21. 21.67 + 81 =
  22. 22.73 + 85 =
  23. 23.54 + 48 =
  24. 24.44 + 37 =
  25. 25.65 + 81 =
  26. 26.42 + 88 =
  27. 27.81 + 68 =
  28. 28.29 + 86 =
  29. 29.57 + 63 =
  30. 30.42 + 23 =
  31. 31.42 + 83 =
  32. 32.42 + 19 =
  33. 33.46 + 89 =
  34. 34.72 + 76 =
  35. 35.61 + 42 =
  36. 36.75 + 48 =
  37. 37.84 + 78 =
  38. 38.56 + 71 =
  39. 39.36 + 45 =
  40. 40.24 + 33 =

Answer key

  1. 114
  2. 80
  3. 53
  4. 155
  5. 78
  6. 114
  7. 109
  8. 88
  9. 133
  10. 90
  11. 90
  12. 162
  13. 118
  14. 116
  15. 79
  16. 139
  17. 146
  18. 104
  19. 145
  20. 74
  21. 148
  22. 158
  23. 102
  24. 81
  25. 146
  26. 130
  27. 149
  28. 115
  29. 120
  30. 65
  31. 125
  32. 61
  33. 135
  34. 148
  35. 103
  36. 123
  37. 162
  38. 127
  39. 81
  40. 57

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