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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 715 · 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. 1.44 + 81 =
  2. 2.50 + 36 =
  3. 3.78 + 17 =
  4. 4.38 + 21 =
  5. 5.43 + 62 =
  6. 6.48 + 86 =
  7. 7.86 + 19 =
  8. 8.75 + 78 =
  9. 9.61 + 42 =
  10. 10.41 + 15 =
  11. 11.67 + 76 =
  12. 12.29 + 61 =
  13. 13.80 + 72 =
  14. 14.68 + 31 =
  15. 15.65 + 51 =
  16. 16.62 + 26 =
  17. 17.82 + 14 =
  18. 18.48 + 82 =
  19. 19.30 + 42 =
  20. 20.60 + 35 =
  21. 21.79 + 31 =
  22. 22.56 + 42 =
  23. 23.88 + 53 =
  24. 24.84 + 14 =
  25. 25.33 + 55 =
  26. 26.34 + 79 =
  27. 27.24 + 69 =
  28. 28.32 + 27 =
  29. 29.44 + 27 =
  30. 30.82 + 35 =
  31. 31.25 + 39 =
  32. 32.24 + 25 =
  33. 33.40 + 74 =
  34. 34.24 + 17 =
  35. 35.36 + 19 =
  36. 36.30 + 75 =
  37. 37.50 + 35 =
  38. 38.87 + 14 =
  39. 39.53 + 85 =
  40. 40.48 + 88 =

Answer key

  1. 125
  2. 86
  3. 95
  4. 59
  5. 105
  6. 134
  7. 105
  8. 153
  9. 103
  10. 56
  11. 143
  12. 90
  13. 152
  14. 99
  15. 116
  16. 88
  17. 96
  18. 130
  19. 72
  20. 95
  21. 110
  22. 98
  23. 141
  24. 98
  25. 88
  26. 113
  27. 93
  28. 59
  29. 71
  30. 117
  31. 64
  32. 49
  33. 114
  34. 41
  35. 55
  36. 105
  37. 85
  38. 101
  39. 138
  40. 136

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