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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 358 · 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. 1.30 + 85 =
  2. 2.35 + 46 =
  3. 3.77 + 45 =
  4. 4.54 + 27 =
  5. 5.75 + 34 =
  6. 6.45 + 37 =
  7. 7.70 + 77 =
  8. 8.54 + 19 =
  9. 9.58 + 18 =
  10. 10.69 + 31 =
  11. 11.46 + 43 =
  12. 12.85 + 49 =
  13. 13.22 + 76 =
  14. 14.33 + 83 =
  15. 15.83 + 77 =
  16. 16.76 + 66 =
  17. 17.31 + 24 =
  18. 18.23 + 54 =
  19. 19.59 + 77 =
  20. 20.51 + 14 =
  21. 21.46 + 29 =
  22. 22.30 + 47 =
  23. 23.85 + 36 =
  24. 24.89 + 49 =
  25. 25.52 + 39 =
  26. 26.80 + 13 =
  27. 27.71 + 29 =
  28. 28.23 + 53 =
  29. 29.64 + 61 =
  30. 30.52 + 42 =
  31. 31.63 + 38 =
  32. 32.33 + 31 =
  33. 33.72 + 76 =
  34. 34.76 + 35 =
  35. 35.64 + 79 =
  36. 36.26 + 35 =
  37. 37.73 + 32 =
  38. 38.34 + 16 =
  39. 39.87 + 24 =
  40. 40.23 + 37 =

Answer key

  1. 115
  2. 81
  3. 122
  4. 81
  5. 109
  6. 82
  7. 147
  8. 73
  9. 76
  10. 100
  11. 89
  12. 134
  13. 98
  14. 116
  15. 160
  16. 142
  17. 55
  18. 77
  19. 136
  20. 65
  21. 75
  22. 77
  23. 121
  24. 138
  25. 91
  26. 93
  27. 100
  28. 76
  29. 125
  30. 94
  31. 101
  32. 64
  33. 148
  34. 111
  35. 143
  36. 61
  37. 105
  38. 50
  39. 111
  40. 60

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