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Efetue a fração usando o método do m.m.c
a)8/10-1/5=

b)5/6-2/3=

c)4/3-1/2=

d)13/4-5/6=

e)7/8-1/6=

F)5/4-1/2=


Sagot :

Colocar como melhor resposta pvr.

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Resposta:

A)3/5

B)1/6

C)5/6

D)29/12

E)17/24

F)3/4

Explicação passo-a-passo:

A) 8/10-1/5

8/10-1/5

8/10-1/5 risque os numeros 8 e 10

8/10

8÷2/10÷2

4/10÷2

8÷2/10÷2

5/4

8/10-1/5 risque de novo os númeradores 8 e 10

4/5-1/5

4-1/5

3/5

B) 5/6-2/3

5/6-2/3

5/6-2×2/3×2

5/6-4/3×2

5/6-2×2/3×2

5/6-4/6

5-4/6

1/6

C)4/3-1/2

4/3-1/2

4×2/3×2-1/2

4×3/-1/2

4×2/3×2-1×3/2×3

8/3×2-1×3/2×3

4×2/3×2-1×3/2×3

8/6-1×3/2×3

4×2/3×2-1×3/2×3

4×2/3×2-1×3/2×3

8/6-3/2×3

4×2/3×2-1×2/2×3

8/6-3/6

8-3/6

5/6

D) 13/4-5/6

13/4-5/6

13×3/4×3-5/6

13×4-5/6

13×3/4×3-5×2/6×2

39/4×3-5×2/6×2

13×3/4×3-5×2/6×2

39×12-5×2/6×2

13×3/4×3-5×2/6×2

39/12-10/6×2

13×3/4×3-5/2/6×2

39/12-10/12

39-10/12

29/12

E) 7/8-1/6

7/8-1/6

7×3/8×3-1/6

7/8-1/6

7×3/8×3-1×4/6×4

21/8×3-1×4/6×4

7×3/8×3-1×4/6×4

21/24-1×4/6×4

7×3/8×3-1×4/6×4

21/24-4/6×4

7×3/8×3-1×4/6×4

21/24-4/23

21-4/24

17/24

F)5/4-1/2

5/4-1/2

5/4-1×2/2×2

5/4-2/2×2

5/4-1×2/2×2

5/4-2/4

5-2/4

3/4