67 dam2 51m2 = 67 dam2 +  m2 =  dam2
82 dam2 7m2 = 82dam2 +  m2 =  dam2

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Chú ý : Khi đo diện tích ruộng đất người ta còn dùng đơn vị héc-ta (ha)

1ha = 10000 m 2

nbbvbbv

65000m²=6,5ha

8,2km²=820ha

9,2 nhé bạn

chứ ko phải 8,2

a) 1,2075 km²=1207500 m²               b) 0,452 hm² = 4520 m² 

c) 12,075 ha = 120750 m²                  d) 10,241 dam²=1024,1 m²

a) 1,2075 km² = 1207500 m²                 b) 0,452 hm² = 4520 m²

c) 12,075 ha = 120750 m²                      d) 10,241 dam² = 1024,1 m²

a) 100 lần

b) 1 lần

c) 10000 m2

a 100

b \(\frac{1}{100}\)

c 100

a, 0,26

b, 0,0481

không phải đâu bạn ý mik là cho mik thêm 1 số đề về đổi  đơn vị đo khối lượng và đơn vị đo độ dài lớp 5 để mik ôn mai mik thi rồi

Giải:

Gọi số bị chia ban đầu là a, số chia là a, thì thương là: a/b

Theo bài ra ta có:

\(\frac{a+24-4}{b+2}\) = \(\frac{a}{b}\)

\(\frac{a+\left(24-4\right)}{b+2}\) = a/b

\(\frac{a+20}{b+2}\) = a/b

ab + 20b = ab + 2a

20b = 2a

a/b = 20/2

a/b = 10

Vậy thương là 10

dễ mừ, bọn mình cũng làm rùi

Gọi số bị chia là a

Số chia là b

Thương là q

Số dư là r

Ta có : 

a+73=q.(b+4)+(r+5)

a+73 = q.b+q.4+ ( r + 5 )

a + 73 = a+4.q+5

Suy ra : 4.q =73-5

4.q=73-5

4.q=68

q=68:4

q=17

Vây thương là 17 . k cho mình nha