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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 712 · 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. 1.70 + 42 =
  2. 2.82 + 41 =
  3. 3.47 + 35 =
  4. 4.23 + 31 =
  5. 5.38 + 12 =
  6. 6.63 + 84 =
  7. 7.22 + 85 =
  8. 8.79 + 14 =
  9. 9.53 + 29 =
  10. 10.25 + 63 =
  11. 11.52 + 39 =
  12. 12.39 + 52 =
  13. 13.23 + 62 =
  14. 14.38 + 87 =
  15. 15.72 + 71 =
  16. 16.78 + 33 =
  17. 17.26 + 64 =
  18. 18.61 + 73 =
  19. 19.89 + 51 =
  20. 20.74 + 25 =
  21. 21.45 + 61 =
  22. 22.41 + 83 =
  23. 23.72 + 84 =
  24. 24.85 + 37 =
  25. 25.37 + 77 =
  26. 26.42 + 31 =
  27. 27.52 + 15 =
  28. 28.36 + 39 =
  29. 29.39 + 43 =
  30. 30.31 + 53 =
  31. 31.76 + 81 =
  32. 32.25 + 49 =
  33. 33.66 + 33 =
  34. 34.72 + 26 =
  35. 35.29 + 87 =
  36. 36.49 + 26 =
  37. 37.62 + 69 =
  38. 38.24 + 51 =
  39. 39.24 + 65 =
  40. 40.64 + 71 =

Answer key

  1. 112
  2. 123
  3. 82
  4. 54
  5. 50
  6. 147
  7. 107
  8. 93
  9. 82
  10. 88
  11. 91
  12. 91
  13. 85
  14. 125
  15. 143
  16. 111
  17. 90
  18. 134
  19. 140
  20. 99
  21. 106
  22. 124
  23. 156
  24. 122
  25. 114
  26. 73
  27. 67
  28. 75
  29. 82
  30. 84
  31. 157
  32. 74
  33. 99
  34. 98
  35. 116
  36. 75
  37. 131
  38. 75
  39. 89
  40. 135

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