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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 821 · 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. 1.74 + 76 =
  2. 2.76 + 58 =
  3. 3.86 + 15 =
  4. 4.47 + 79 =
  5. 5.88 + 21 =
  6. 6.57 + 58 =
  7. 7.65 + 52 =
  8. 8.42 + 32 =
  9. 9.54 + 32 =
  10. 10.39 + 24 =
  11. 11.73 + 62 =
  12. 12.77 + 68 =
  13. 13.42 + 61 =
  14. 14.63 + 33 =
  15. 15.34 + 61 =
  16. 16.37 + 73 =
  17. 17.35 + 33 =
  18. 18.48 + 16 =
  19. 19.26 + 61 =
  20. 20.74 + 73 =
  21. 21.55 + 89 =
  22. 22.74 + 88 =
  23. 23.24 + 21 =
  24. 24.76 + 26 =
  25. 25.87 + 55 =
  26. 26.41 + 46 =
  27. 27.48 + 36 =
  28. 28.25 + 86 =
  29. 29.46 + 31 =
  30. 30.78 + 47 =
  31. 31.44 + 41 =
  32. 32.67 + 47 =
  33. 33.83 + 41 =
  34. 34.32 + 64 =
  35. 35.52 + 39 =
  36. 36.47 + 39 =
  37. 37.56 + 28 =
  38. 38.40 + 84 =
  39. 39.75 + 53 =
  40. 40.48 + 45 =

Answer key

  1. 150
  2. 134
  3. 101
  4. 126
  5. 109
  6. 115
  7. 117
  8. 74
  9. 86
  10. 63
  11. 135
  12. 145
  13. 103
  14. 96
  15. 95
  16. 110
  17. 68
  18. 64
  19. 87
  20. 147
  21. 144
  22. 162
  23. 45
  24. 102
  25. 142
  26. 87
  27. 84
  28. 111
  29. 77
  30. 125
  31. 85
  32. 114
  33. 124
  34. 96
  35. 91
  36. 86
  37. 84
  38. 124
  39. 128
  40. 93

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