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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 980 · 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. 1.38 + 32 =
  2. 2.35 + 29 =
  3. 3.61 + 45 =
  4. 4.87 + 59 =
  5. 5.22 + 25 =
  6. 6.67 + 45 =
  7. 7.79 + 36 =
  8. 8.84 + 44 =
  9. 9.23 + 17 =
  10. 10.41 + 51 =
  11. 11.66 + 74 =
  12. 12.65 + 39 =
  13. 13.76 + 42 =
  14. 14.35 + 73 =
  15. 15.79 + 46 =
  16. 16.88 + 67 =
  17. 17.49 + 15 =
  18. 18.61 + 64 =
  19. 19.53 + 17 =
  20. 20.44 + 56 =
  21. 21.48 + 26 =
  22. 22.83 + 83 =
  23. 23.54 + 46 =
  24. 24.73 + 52 =
  25. 25.61 + 51 =
  26. 26.69 + 58 =
  27. 27.22 + 36 =
  28. 28.85 + 53 =
  29. 29.87 + 48 =
  30. 30.41 + 24 =
  31. 31.71 + 51 =
  32. 32.84 + 13 =
  33. 33.63 + 64 =
  34. 34.51 + 57 =
  35. 35.55 + 81 =
  36. 36.27 + 72 =
  37. 37.70 + 86 =
  38. 38.79 + 29 =
  39. 39.36 + 49 =
  40. 40.83 + 81 =

Answer key

  1. 70
  2. 64
  3. 106
  4. 146
  5. 47
  6. 112
  7. 115
  8. 128
  9. 40
  10. 92
  11. 140
  12. 104
  13. 118
  14. 108
  15. 125
  16. 155
  17. 64
  18. 125
  19. 70
  20. 100
  21. 74
  22. 166
  23. 100
  24. 125
  25. 112
  26. 127
  27. 58
  28. 138
  29. 135
  30. 65
  31. 122
  32. 97
  33. 127
  34. 108
  35. 136
  36. 99
  37. 156
  38. 108
  39. 85
  40. 164

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