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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 732 · 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. 1.59 + 51 =
  2. 2.35 + 75 =
  3. 3.74 + 73 =
  4. 4.54 + 36 =
  5. 5.27 + 28 =
  6. 6.36 + 65 =
  7. 7.22 + 76 =
  8. 8.67 + 62 =
  9. 9.33 + 74 =
  10. 10.32 + 58 =
  11. 11.36 + 21 =
  12. 12.55 + 79 =
  13. 13.64 + 33 =
  14. 14.45 + 57 =
  15. 15.54 + 18 =
  16. 16.81 + 66 =
  17. 17.29 + 16 =
  18. 18.71 + 57 =
  19. 19.88 + 81 =
  20. 20.40 + 65 =
  21. 21.39 + 18 =
  22. 22.74 + 78 =
  23. 23.24 + 57 =
  24. 24.75 + 41 =
  25. 25.83 + 26 =
  26. 26.29 + 81 =
  27. 27.30 + 79 =
  28. 28.65 + 56 =
  29. 29.35 + 63 =
  30. 30.37 + 85 =
  31. 31.80 + 75 =
  32. 32.26 + 34 =
  33. 33.89 + 21 =
  34. 34.75 + 15 =
  35. 35.35 + 51 =
  36. 36.86 + 17 =
  37. 37.75 + 49 =
  38. 38.32 + 46 =
  39. 39.74 + 21 =
  40. 40.22 + 21 =

Answer key

  1. 110
  2. 110
  3. 147
  4. 90
  5. 55
  6. 101
  7. 98
  8. 129
  9. 107
  10. 90
  11. 57
  12. 134
  13. 97
  14. 102
  15. 72
  16. 147
  17. 45
  18. 128
  19. 169
  20. 105
  21. 57
  22. 152
  23. 81
  24. 116
  25. 109
  26. 110
  27. 109
  28. 121
  29. 98
  30. 122
  31. 155
  32. 60
  33. 110
  34. 90
  35. 86
  36. 103
  37. 124
  38. 78
  39. 95
  40. 43

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