Lúc đầu cuộn vải đó dài:
45 + 7 : 1/3 =156 ( m )
Đáp số: 156 m vải.
Tk mình nha mấy cậu
156 đó nha !
dễ ợt mk làm được 300 đó nha
Số phần vải còn lại sau khi cắt 1/3 là: 1 - 1/3 = 2/3 (cuộn vải)
2/3 cuộn vải tương ứng với số mét vải là: 45 + 7 = 52 (m)
Cuộn vải lúc đầu dài là: 52 : 2 x 3 = 78 (m)
ngọc minh làm sai rồi bạn cũng k sai rồi thạnh ơi
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