bai:16                                                                                                                                                                                          cau 4.gia tri nho nhat co chu so hang tram la 1.                                                                                                                                        vay chu so hang tram la 1+3=4                                                                                                                                                      chu so hang don vi la 4:2=2                                                                                                                                                           so co ba chu so phai tim la:142

28-X-X-X=7

28-Xx3=7

Xx3=28-7

Xx3=21

x=21:3

x=7

Gà trống bằng 1/4 gà mái

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810 nha

-1 nhé k m nhé

1 bình thông nhau mỗi nhánh có tiết diện 40cm² chứa nước có TLR d=10000m². Người ta đổ vào nhánh trái 1l dầu có TLR 8000N/m³

a) Mực chất lỏng ở chất nào cao hơn ? Vì sao?

b) Tìm độ chênh lệch giữa 2 mực chất lỏng