Giải toán lớp 5: Bài toán số phần bằng nhau

Chủ nhật - 27/03/2016 09:25
Một sợi dây thừng dài 78m được cắt thành 2 đoạn, đoạn thứ hai dài gấp 5 lần đoạn thứ nhất. Hỏi mỗi đoạn dài bao nhiêu mét? (Tan bao)
Giải:

Theo đề bài ta có sơ đồ:
bai toan chia phan bang nhau





Như vậy đoạn dây thừng được chia làm 6 phần.
Đoạn thứ nhất dài là:
78 : 6 = 13 m
Đoạn thứ hai dài là:
5 x 13 = 65 m

ĐS: 13m; 65m

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