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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 545 · 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. 1.75 + 63 =
  2. 2.48 + 31 =
  3. 3.79 + 26 =
  4. 4.25 + 24 =
  5. 5.83 + 16 =
  6. 6.79 + 24 =
  7. 7.63 + 44 =
  8. 8.89 + 71 =
  9. 9.55 + 23 =
  10. 10.36 + 19 =
  11. 11.85 + 69 =
  12. 12.42 + 71 =
  13. 13.56 + 36 =
  14. 14.81 + 86 =
  15. 15.41 + 74 =
  16. 16.43 + 52 =
  17. 17.21 + 19 =
  18. 18.34 + 77 =
  19. 19.25 + 35 =
  20. 20.33 + 53 =
  21. 21.76 + 56 =
  22. 22.71 + 24 =
  23. 23.72 + 87 =
  24. 24.53 + 61 =
  25. 25.25 + 78 =
  26. 26.39 + 68 =
  27. 27.85 + 67 =
  28. 28.43 + 16 =
  29. 29.77 + 71 =
  30. 30.34 + 12 =
  31. 31.36 + 23 =
  32. 32.74 + 71 =
  33. 33.21 + 14 =
  34. 34.76 + 44 =
  35. 35.23 + 65 =
  36. 36.71 + 72 =
  37. 37.44 + 17 =
  38. 38.81 + 25 =
  39. 39.24 + 35 =
  40. 40.53 + 86 =

Answer key

  1. 138
  2. 79
  3. 105
  4. 49
  5. 99
  6. 103
  7. 107
  8. 160
  9. 78
  10. 55
  11. 154
  12. 113
  13. 92
  14. 167
  15. 115
  16. 95
  17. 40
  18. 111
  19. 60
  20. 86
  21. 132
  22. 95
  23. 159
  24. 114
  25. 103
  26. 107
  27. 152
  28. 59
  29. 148
  30. 46
  31. 59
  32. 145
  33. 35
  34. 120
  35. 88
  36. 143
  37. 61
  38. 106
  39. 59
  40. 139

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