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Mental Addition Worksheet for Class 2 and 3

Mental maths lesson 6: Add 2-digit numbers left to right · Set 488 · 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. 1.77 + 43 =
  2. 2.34 + 39 =
  3. 3.58 + 79 =
  4. 4.70 + 12 =
  5. 5.71 + 17 =
  6. 6.23 + 77 =
  7. 7.83 + 43 =
  8. 8.24 + 88 =
  9. 9.41 + 79 =
  10. 10.79 + 54 =
  11. 11.74 + 79 =
  12. 12.70 + 69 =
  13. 13.41 + 13 =
  14. 14.48 + 27 =
  15. 15.52 + 26 =
  16. 16.21 + 24 =
  17. 17.87 + 66 =
  18. 18.24 + 32 =
  19. 19.40 + 21 =
  20. 20.42 + 25 =
  21. 21.59 + 75 =
  22. 22.73 + 33 =
  23. 23.79 + 79 =
  24. 24.62 + 31 =
  25. 25.67 + 77 =
  26. 26.42 + 13 =
  27. 27.70 + 65 =
  28. 28.70 + 47 =
  29. 29.62 + 33 =
  30. 30.78 + 29 =
  31. 31.86 + 77 =
  32. 32.26 + 38 =
  33. 33.27 + 25 =
  34. 34.55 + 44 =
  35. 35.85 + 35 =
  36. 36.65 + 31 =
  37. 37.78 + 57 =
  38. 38.27 + 42 =
  39. 39.46 + 53 =
  40. 40.30 + 75 =

Answer key

  1. 120
  2. 73
  3. 137
  4. 82
  5. 88
  6. 100
  7. 126
  8. 112
  9. 120
  10. 133
  11. 153
  12. 139
  13. 54
  14. 75
  15. 78
  16. 45
  17. 153
  18. 56
  19. 61
  20. 67
  21. 134
  22. 106
  23. 158
  24. 93
  25. 144
  26. 55
  27. 135
  28. 117
  29. 95
  30. 107
  31. 163
  32. 64
  33. 52
  34. 99
  35. 120
  36. 96
  37. 135
  38. 69
  39. 99
  40. 105

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