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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 895 · 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. 1.42 + 14 =
  2. 2.88 + 12 =
  3. 3.42 + 39 =
  4. 4.70 + 38 =
  5. 5.81 + 77 =
  6. 6.60 + 69 =
  7. 7.32 + 37 =
  8. 8.50 + 65 =
  9. 9.32 + 35 =
  10. 10.82 + 87 =
  11. 11.30 + 76 =
  12. 12.21 + 23 =
  13. 13.56 + 56 =
  14. 14.76 + 71 =
  15. 15.39 + 46 =
  16. 16.78 + 26 =
  17. 17.39 + 45 =
  18. 18.74 + 53 =
  19. 19.52 + 18 =
  20. 20.56 + 12 =
  21. 21.27 + 71 =
  22. 22.26 + 59 =
  23. 23.80 + 58 =
  24. 24.61 + 58 =
  25. 25.77 + 53 =
  26. 26.71 + 46 =
  27. 27.62 + 23 =
  28. 28.60 + 15 =
  29. 29.78 + 25 =
  30. 30.47 + 51 =
  31. 31.69 + 84 =
  32. 32.30 + 66 =
  33. 33.40 + 61 =
  34. 34.70 + 45 =
  35. 35.49 + 14 =
  36. 36.47 + 14 =
  37. 37.81 + 67 =
  38. 38.76 + 32 =
  39. 39.39 + 41 =
  40. 40.74 + 45 =

Answer key

  1. 56
  2. 100
  3. 81
  4. 108
  5. 158
  6. 129
  7. 69
  8. 115
  9. 67
  10. 169
  11. 106
  12. 44
  13. 112
  14. 147
  15. 85
  16. 104
  17. 84
  18. 127
  19. 70
  20. 68
  21. 98
  22. 85
  23. 138
  24. 119
  25. 130
  26. 117
  27. 85
  28. 75
  29. 103
  30. 98
  31. 153
  32. 96
  33. 101
  34. 115
  35. 63
  36. 61
  37. 148
  38. 108
  39. 80
  40. 119

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