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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 888 · 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. 1.48 + 46 =
  2. 2.47 + 65 =
  3. 3.38 + 51 =
  4. 4.45 + 66 =
  5. 5.71 + 23 =
  6. 6.26 + 61 =
  7. 7.54 + 89 =
  8. 8.76 + 81 =
  9. 9.70 + 24 =
  10. 10.34 + 18 =
  11. 11.88 + 72 =
  12. 12.75 + 61 =
  13. 13.66 + 37 =
  14. 14.33 + 56 =
  15. 15.79 + 56 =
  16. 16.42 + 21 =
  17. 17.60 + 31 =
  18. 18.84 + 33 =
  19. 19.53 + 75 =
  20. 20.80 + 72 =
  21. 21.56 + 54 =
  22. 22.56 + 37 =
  23. 23.73 + 28 =
  24. 24.49 + 82 =
  25. 25.42 + 27 =
  26. 26.60 + 35 =
  27. 27.72 + 87 =
  28. 28.44 + 65 =
  29. 29.27 + 64 =
  30. 30.27 + 61 =
  31. 31.74 + 35 =
  32. 32.43 + 15 =
  33. 33.35 + 71 =
  34. 34.32 + 27 =
  35. 35.69 + 71 =
  36. 36.49 + 88 =
  37. 37.75 + 25 =
  38. 38.79 + 51 =
  39. 39.28 + 83 =
  40. 40.71 + 65 =

Answer key

  1. 94
  2. 112
  3. 89
  4. 111
  5. 94
  6. 87
  7. 143
  8. 157
  9. 94
  10. 52
  11. 160
  12. 136
  13. 103
  14. 89
  15. 135
  16. 63
  17. 91
  18. 117
  19. 128
  20. 152
  21. 110
  22. 93
  23. 101
  24. 131
  25. 69
  26. 95
  27. 159
  28. 109
  29. 91
  30. 88
  31. 109
  32. 58
  33. 106
  34. 59
  35. 140
  36. 137
  37. 100
  38. 130
  39. 111
  40. 136

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