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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 250 · 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. 1.37 + 62 =
  2. 2.34 + 21 =
  3. 3.63 + 17 =
  4. 4.55 + 46 =
  5. 5.41 + 55 =
  6. 6.44 + 35 =
  7. 7.69 + 66 =
  8. 8.61 + 85 =
  9. 9.71 + 31 =
  10. 10.79 + 23 =
  11. 11.67 + 46 =
  12. 12.26 + 68 =
  13. 13.75 + 52 =
  14. 14.31 + 22 =
  15. 15.77 + 26 =
  16. 16.79 + 84 =
  17. 17.39 + 85 =
  18. 18.33 + 39 =
  19. 19.84 + 83 =
  20. 20.58 + 72 =
  21. 21.32 + 17 =
  22. 22.54 + 36 =
  23. 23.80 + 51 =
  24. 24.73 + 68 =
  25. 25.60 + 59 =
  26. 26.88 + 29 =
  27. 27.70 + 87 =
  28. 28.22 + 48 =
  29. 29.26 + 72 =
  30. 30.47 + 26 =
  31. 31.22 + 33 =
  32. 32.47 + 51 =
  33. 33.87 + 68 =
  34. 34.75 + 83 =
  35. 35.27 + 15 =
  36. 36.26 + 45 =
  37. 37.71 + 63 =
  38. 38.43 + 76 =
  39. 39.71 + 27 =
  40. 40.22 + 56 =

Answer key

  1. 99
  2. 55
  3. 80
  4. 101
  5. 96
  6. 79
  7. 135
  8. 146
  9. 102
  10. 102
  11. 113
  12. 94
  13. 127
  14. 53
  15. 103
  16. 163
  17. 124
  18. 72
  19. 167
  20. 130
  21. 49
  22. 90
  23. 131
  24. 141
  25. 119
  26. 117
  27. 157
  28. 70
  29. 98
  30. 73
  31. 55
  32. 98
  33. 155
  34. 158
  35. 42
  36. 71
  37. 134
  38. 119
  39. 98
  40. 78

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