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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 3 · 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. 1.80 + 12 =
  2. 2.21 + 64 =
  3. 3.23 + 21 =
  4. 4.30 + 31 =
  5. 5.29 + 51 =
  6. 6.28 + 72 =
  7. 7.28 + 12 =
  8. 8.36 + 25 =
  9. 9.71 + 68 =
  10. 10.22 + 72 =
  11. 11.55 + 69 =
  12. 12.47 + 51 =
  13. 13.87 + 61 =
  14. 14.32 + 73 =
  15. 15.73 + 41 =
  16. 16.74 + 62 =
  17. 17.38 + 26 =
  18. 18.88 + 43 =
  19. 19.61 + 66 =
  20. 20.72 + 21 =
  21. 21.33 + 45 =
  22. 22.26 + 15 =
  23. 23.63 + 29 =
  24. 24.88 + 21 =
  25. 25.39 + 15 =
  26. 26.24 + 19 =
  27. 27.52 + 57 =
  28. 28.36 + 79 =
  29. 29.45 + 19 =
  30. 30.22 + 86 =
  31. 31.70 + 79 =
  32. 32.66 + 85 =
  33. 33.81 + 77 =
  34. 34.40 + 31 =
  35. 35.24 + 17 =
  36. 36.42 + 77 =
  37. 37.50 + 82 =
  38. 38.81 + 28 =
  39. 39.84 + 81 =
  40. 40.53 + 47 =

Answer key

  1. 92
  2. 85
  3. 44
  4. 61
  5. 80
  6. 100
  7. 40
  8. 61
  9. 139
  10. 94
  11. 124
  12. 98
  13. 148
  14. 105
  15. 114
  16. 136
  17. 64
  18. 131
  19. 127
  20. 93
  21. 78
  22. 41
  23. 92
  24. 109
  25. 54
  26. 43
  27. 109
  28. 115
  29. 64
  30. 108
  31. 149
  32. 151
  33. 158
  34. 71
  35. 41
  36. 119
  37. 132
  38. 109
  39. 165
  40. 100

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