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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 434 · 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. 1.73 + 81 =
  2. 2.60 + 72 =
  3. 3.70 + 74 =
  4. 4.30 + 55 =
  5. 5.49 + 71 =
  6. 6.34 + 68 =
  7. 7.81 + 67 =
  8. 8.31 + 14 =
  9. 9.64 + 28 =
  10. 10.34 + 14 =
  11. 11.86 + 41 =
  12. 12.26 + 53 =
  13. 13.50 + 83 =
  14. 14.67 + 17 =
  15. 15.36 + 19 =
  16. 16.25 + 81 =
  17. 17.81 + 68 =
  18. 18.34 + 61 =
  19. 19.60 + 63 =
  20. 20.46 + 32 =
  21. 21.41 + 47 =
  22. 22.32 + 23 =
  23. 23.71 + 61 =
  24. 24.47 + 67 =
  25. 25.32 + 67 =
  26. 26.44 + 34 =
  27. 27.69 + 52 =
  28. 28.68 + 31 =
  29. 29.41 + 83 =
  30. 30.65 + 21 =
  31. 31.34 + 65 =
  32. 32.35 + 46 =
  33. 33.39 + 12 =
  34. 34.52 + 47 =
  35. 35.54 + 61 =
  36. 36.31 + 36 =
  37. 37.62 + 61 =
  38. 38.74 + 41 =
  39. 39.59 + 75 =
  40. 40.34 + 15 =

Answer key

  1. 154
  2. 132
  3. 144
  4. 85
  5. 120
  6. 102
  7. 148
  8. 45
  9. 92
  10. 48
  11. 127
  12. 79
  13. 133
  14. 84
  15. 55
  16. 106
  17. 149
  18. 95
  19. 123
  20. 78
  21. 88
  22. 55
  23. 132
  24. 114
  25. 99
  26. 78
  27. 121
  28. 99
  29. 124
  30. 86
  31. 99
  32. 81
  33. 51
  34. 99
  35. 115
  36. 67
  37. 123
  38. 115
  39. 134
  40. 49

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