Hiệu 2 số là 75.Nếu tăng số bị trừ lên 8 đơn vị và giảm số trừ đi 9 đơn vị thì hiệu mới là bao nhiêu?
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Bài làm :
Đổ đầy nước vào can 7 lít
Đổ 7 lít nước từ can 7 lít vào can 3 lít => Can 7 lít còn 4 lít nước
Đổ hết nước từ can 3 lít đi
Đổ 4 lít nước từ can 7 lít vào can 3 lít => Can 7 lít còn 1 lít nước
Đổ hết nước từ can 3 lít đi
Đổ 1 lít nước từ can 7 lít vào can 3 lít => Can 7 lít hết nước ; can 3 lít có 1 lít nước
Đổ đầy nước vào can 7 lít
Đổ 7 lít nước từ can 7 lít vào can 3 lít ( Can 3 lít chứa 1 lít nước) => Can 7 lít có 5 lít nước
Đổ hết nước từ can 3 lít đi
Đổ 5 lít nước từ can 7 lít vào can 3 lít => Ta được 2 lít nước từ can 7 lít
Ngay thẳng; nghĩ ngợi; nghề nghiệp; nghe lời
Chân tay; trí nhớ; chèo thuyền; trèo cây
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tìm chữ I
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Hiệu mới là 92
ngovannhatminh