Vì đã quên viết 0 nên giảm đi :
1007 - 17 = 990
Vậy số đó là :
3153150 : 990 = 3185
Vậy số đó là 3185
Đáp số : 3185
Quên viết 2 chữ số 0 => bạn đã nhân với 17
Giảm xuống :
1007 - 17 = 990 ( lần )
Số đó là :
3 153 150 : 990 = 3 185
đ/s : 3 185
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