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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 897 · 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. 1.61 + 51 =
  2. 2.77 + 21 =
  3. 3.47 + 81 =
  4. 4.55 + 41 =
  5. 5.51 + 48 =
  6. 6.40 + 56 =
  7. 7.40 + 18 =
  8. 8.75 + 25 =
  9. 9.84 + 41 =
  10. 10.47 + 44 =
  11. 11.59 + 58 =
  12. 12.70 + 23 =
  13. 13.31 + 12 =
  14. 14.89 + 51 =
  15. 15.64 + 49 =
  16. 16.70 + 21 =
  17. 17.80 + 41 =
  18. 18.26 + 62 =
  19. 19.25 + 38 =
  20. 20.80 + 62 =
  21. 21.71 + 58 =
  22. 22.77 + 26 =
  23. 23.22 + 42 =
  24. 24.29 + 79 =
  25. 25.71 + 72 =
  26. 26.55 + 35 =
  27. 27.71 + 63 =
  28. 28.45 + 23 =
  29. 29.57 + 61 =
  30. 30.73 + 45 =
  31. 31.64 + 73 =
  32. 32.56 + 17 =
  33. 33.65 + 83 =
  34. 34.37 + 85 =
  35. 35.28 + 77 =
  36. 36.43 + 41 =
  37. 37.62 + 52 =
  38. 38.72 + 88 =
  39. 39.69 + 55 =
  40. 40.46 + 67 =

Answer key

  1. 112
  2. 98
  3. 128
  4. 96
  5. 99
  6. 96
  7. 58
  8. 100
  9. 125
  10. 91
  11. 117
  12. 93
  13. 43
  14. 140
  15. 113
  16. 91
  17. 121
  18. 88
  19. 63
  20. 142
  21. 129
  22. 103
  23. 64
  24. 108
  25. 143
  26. 90
  27. 134
  28. 68
  29. 118
  30. 118
  31. 137
  32. 73
  33. 148
  34. 122
  35. 105
  36. 84
  37. 114
  38. 160
  39. 124
  40. 113

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