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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 642 · 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. 1.26 + 47 =
  2. 2.21 + 71 =
  3. 3.61 + 81 =
  4. 4.52 + 21 =
  5. 5.53 + 69 =
  6. 6.65 + 39 =
  7. 7.76 + 71 =
  8. 8.67 + 88 =
  9. 9.78 + 87 =
  10. 10.57 + 17 =
  11. 11.30 + 62 =
  12. 12.59 + 17 =
  13. 13.72 + 71 =
  14. 14.46 + 33 =
  15. 15.25 + 59 =
  16. 16.56 + 23 =
  17. 17.37 + 57 =
  18. 18.37 + 17 =
  19. 19.42 + 24 =
  20. 20.62 + 72 =
  21. 21.79 + 51 =
  22. 22.73 + 55 =
  23. 23.69 + 42 =
  24. 24.56 + 75 =
  25. 25.38 + 89 =
  26. 26.69 + 54 =
  27. 27.64 + 86 =
  28. 28.45 + 61 =
  29. 29.48 + 44 =
  30. 30.32 + 31 =
  31. 31.47 + 45 =
  32. 32.52 + 34 =
  33. 33.59 + 14 =
  34. 34.51 + 31 =
  35. 35.41 + 71 =
  36. 36.28 + 65 =
  37. 37.29 + 51 =
  38. 38.30 + 46 =
  39. 39.46 + 89 =
  40. 40.30 + 49 =

Answer key

  1. 73
  2. 92
  3. 142
  4. 73
  5. 122
  6. 104
  7. 147
  8. 155
  9. 165
  10. 74
  11. 92
  12. 76
  13. 143
  14. 79
  15. 84
  16. 79
  17. 94
  18. 54
  19. 66
  20. 134
  21. 130
  22. 128
  23. 111
  24. 131
  25. 127
  26. 123
  27. 150
  28. 106
  29. 92
  30. 63
  31. 92
  32. 86
  33. 73
  34. 82
  35. 112
  36. 93
  37. 80
  38. 76
  39. 135
  40. 79

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