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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 942 · 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. 1.35 + 12 =
  2. 2.50 + 42 =
  3. 3.87 + 28 =
  4. 4.47 + 47 =
  5. 5.75 + 31 =
  6. 6.80 + 75 =
  7. 7.46 + 14 =
  8. 8.83 + 89 =
  9. 9.79 + 42 =
  10. 10.32 + 58 =
  11. 11.37 + 79 =
  12. 12.54 + 82 =
  13. 13.67 + 54 =
  14. 14.67 + 47 =
  15. 15.47 + 64 =
  16. 16.27 + 26 =
  17. 17.30 + 66 =
  18. 18.21 + 75 =
  19. 19.31 + 87 =
  20. 20.27 + 69 =
  21. 21.39 + 62 =
  22. 22.42 + 41 =
  23. 23.70 + 79 =
  24. 24.41 + 31 =
  25. 25.24 + 17 =
  26. 26.81 + 81 =
  27. 27.74 + 51 =
  28. 28.28 + 54 =
  29. 29.38 + 21 =
  30. 30.58 + 35 =
  31. 31.49 + 28 =
  32. 32.25 + 56 =
  33. 33.21 + 46 =
  34. 34.75 + 63 =
  35. 35.48 + 51 =
  36. 36.83 + 86 =
  37. 37.87 + 29 =
  38. 38.76 + 81 =
  39. 39.69 + 29 =
  40. 40.76 + 85 =

Answer key

  1. 47
  2. 92
  3. 115
  4. 94
  5. 106
  6. 155
  7. 60
  8. 172
  9. 121
  10. 90
  11. 116
  12. 136
  13. 121
  14. 114
  15. 111
  16. 53
  17. 96
  18. 96
  19. 118
  20. 96
  21. 101
  22. 83
  23. 149
  24. 72
  25. 41
  26. 162
  27. 125
  28. 82
  29. 59
  30. 93
  31. 77
  32. 81
  33. 67
  34. 138
  35. 99
  36. 169
  37. 116
  38. 157
  39. 98
  40. 161

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