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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 73 · 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 + 74 =
  2. 2.34 + 21 =
  3. 3.52 + 39 =
  4. 4.38 + 48 =
  5. 5.84 + 69 =
  6. 6.55 + 74 =
  7. 7.24 + 47 =
  8. 8.27 + 22 =
  9. 9.58 + 52 =
  10. 10.49 + 67 =
  11. 11.63 + 65 =
  12. 12.34 + 16 =
  13. 13.21 + 42 =
  14. 14.64 + 68 =
  15. 15.84 + 64 =
  16. 16.46 + 12 =
  17. 17.73 + 27 =
  18. 18.78 + 79 =
  19. 19.80 + 12 =
  20. 20.64 + 16 =
  21. 21.70 + 46 =
  22. 22.81 + 77 =
  23. 23.58 + 66 =
  24. 24.31 + 25 =
  25. 25.76 + 77 =
  26. 26.76 + 38 =
  27. 27.89 + 63 =
  28. 28.86 + 67 =
  29. 29.39 + 25 =
  30. 30.34 + 55 =
  31. 31.86 + 81 =
  32. 32.69 + 34 =
  33. 33.70 + 51 =
  34. 34.89 + 23 =
  35. 35.35 + 41 =
  36. 36.56 + 86 =
  37. 37.59 + 71 =
  38. 38.70 + 66 =
  39. 39.35 + 24 =
  40. 40.42 + 77 =

Answer key

  1. 147
  2. 55
  3. 91
  4. 86
  5. 153
  6. 129
  7. 71
  8. 49
  9. 110
  10. 116
  11. 128
  12. 50
  13. 63
  14. 132
  15. 148
  16. 58
  17. 100
  18. 157
  19. 92
  20. 80
  21. 116
  22. 158
  23. 124
  24. 56
  25. 153
  26. 114
  27. 152
  28. 153
  29. 64
  30. 89
  31. 167
  32. 103
  33. 121
  34. 112
  35. 76
  36. 142
  37. 130
  38. 136
  39. 59
  40. 119

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