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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 449 · 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. 1.46 + 15 =
  2. 2.76 + 14 =
  3. 3.43 + 76 =
  4. 4.68 + 44 =
  5. 5.34 + 16 =
  6. 6.28 + 17 =
  7. 7.78 + 16 =
  8. 8.44 + 81 =
  9. 9.67 + 32 =
  10. 10.88 + 81 =
  11. 11.60 + 74 =
  12. 12.33 + 21 =
  13. 13.79 + 19 =
  14. 14.53 + 87 =
  15. 15.31 + 37 =
  16. 16.34 + 27 =
  17. 17.41 + 62 =
  18. 18.36 + 31 =
  19. 19.56 + 39 =
  20. 20.63 + 49 =
  21. 21.53 + 38 =
  22. 22.72 + 81 =
  23. 23.26 + 74 =
  24. 24.68 + 36 =
  25. 25.57 + 88 =
  26. 26.39 + 59 =
  27. 27.66 + 88 =
  28. 28.46 + 44 =
  29. 29.23 + 72 =
  30. 30.87 + 72 =
  31. 31.54 + 32 =
  32. 32.30 + 22 =
  33. 33.37 + 76 =
  34. 34.35 + 43 =
  35. 35.80 + 25 =
  36. 36.56 + 87 =
  37. 37.47 + 72 =
  38. 38.37 + 28 =
  39. 39.39 + 17 =
  40. 40.27 + 84 =

Answer key

  1. 61
  2. 90
  3. 119
  4. 112
  5. 50
  6. 45
  7. 94
  8. 125
  9. 99
  10. 169
  11. 134
  12. 54
  13. 98
  14. 140
  15. 68
  16. 61
  17. 103
  18. 67
  19. 95
  20. 112
  21. 91
  22. 153
  23. 100
  24. 104
  25. 145
  26. 98
  27. 154
  28. 90
  29. 95
  30. 159
  31. 86
  32. 52
  33. 113
  34. 78
  35. 105
  36. 143
  37. 119
  38. 65
  39. 56
  40. 111

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