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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 944 · 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 + 22 =
  2. 2.57 + 43 =
  3. 3.52 + 52 =
  4. 4.33 + 68 =
  5. 5.23 + 51 =
  6. 6.35 + 21 =
  7. 7.67 + 48 =
  8. 8.69 + 59 =
  9. 9.82 + 67 =
  10. 10.75 + 84 =
  11. 11.42 + 58 =
  12. 12.22 + 19 =
  13. 13.30 + 65 =
  14. 14.33 + 88 =
  15. 15.79 + 57 =
  16. 16.27 + 85 =
  17. 17.67 + 85 =
  18. 18.49 + 73 =
  19. 19.36 + 79 =
  20. 20.28 + 81 =
  21. 21.29 + 55 =
  22. 22.89 + 81 =
  23. 23.37 + 54 =
  24. 24.41 + 21 =
  25. 25.80 + 14 =
  26. 26.75 + 68 =
  27. 27.42 + 14 =
  28. 28.40 + 18 =
  29. 29.61 + 27 =
  30. 30.63 + 44 =
  31. 31.53 + 88 =
  32. 32.59 + 14 =
  33. 33.41 + 14 =
  34. 34.89 + 36 =
  35. 35.56 + 45 =
  36. 36.27 + 24 =
  37. 37.29 + 21 =
  38. 38.59 + 21 =
  39. 39.85 + 32 =
  40. 40.73 + 71 =

Answer key

  1. 57
  2. 100
  3. 104
  4. 101
  5. 74
  6. 56
  7. 115
  8. 128
  9. 149
  10. 159
  11. 100
  12. 41
  13. 95
  14. 121
  15. 136
  16. 112
  17. 152
  18. 122
  19. 115
  20. 109
  21. 84
  22. 170
  23. 91
  24. 62
  25. 94
  26. 143
  27. 56
  28. 58
  29. 88
  30. 107
  31. 141
  32. 73
  33. 55
  34. 125
  35. 101
  36. 51
  37. 50
  38. 80
  39. 117
  40. 144

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