Theo đề bài, ta có:
abc x d2 = 1356 ( abc là số có 3 chữ số, d2 là số có 2 chữ số )
Khi viết nhầm, ta có:
abc x d8 = 2034
Tích mới hơn tích cũ là:
2034 - 1356 = 678
Số có ba chữ số là:
678 : ( 8 - 2 ) = 113
Đáp số: 113
Do viết nhầm nên tích mới đã tăng thêm :
8 - 2 = 6 ( lần ) ( số có 3 chữ số đó )
Vậy số có 3 chữ số đó là :
( 2034 - 1356 ) : 6 = 113
Đáp số : 113
Do viết nhầm nên tích mới đã tăng thêm :
8 - 2 = 6 ( lần ) ( số có 3 chữ số đó )
Vậy số có 3 chữ số đó là :
( 2034 - 1356 ) : 6 = 113
Đáp số : 113
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