101-49 in mental math
Mental technique for subtraction without regrouping | 3rd grade | Khan Academy
Use an understanding of place-value to subtract. Watch the next lesson: ...
Answer
101 - 49 =
100 +1 -50 +1 =
100 - 50 + 1 + 1 =
100 -50 + 2 =
50 + 2 =
52
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