Matematică, întrebare adresată de memeswaifu, 8 ani în urmă

URGEN!!!
CU TOATE OPERATILE!!

Anexe:

Răspunsuri la întrebare

Răspuns de tofanandreeamihaela
1

Răspuns:

a)

(12/25+3/5): 9/35=

(12/25+15/25)× 35/9=

27/25×35/9=

21/5

b)

(11/8+1/6) :37/3=

(33/24+4/24)×3/37=

37/24×3/37=

1/8

c)

(2 1/6-7/9) :5/9=

(2×6/6+1/6- 7/9) ×9/5=

(13/6-7/9)×9/5=

(39/18-14/18)×9/5=

25/18×9/5=

5/2

d)

(2 1/2+5 1/6) :7 2/3=

(2×2/2+1/2 + 5×6/6+1/6): 7×3/3+2/3=

(5/2+31/6) : 23/3=

(15/6+31/6)× 3/23=

46/6× 3/23=

2/2=

1

8)a)(2 1/10)/3/5=

(2×10/10+1/10)/ 3/5=

21/10× 5/3=

7/2

b) 1/9 / 3/7=

1/9×7/3=

7/27

c) 14/( 3 1/2)=

14/(3×2/2+1/2)=

14/ 7/2=

14×2/7=

28/7=

4

d) (5/7)/(15/42)=

5/7 × 42/15=

6/3=

2

e)

3 1/7 / 1 1/21=

(3×7/7+1/7) / (21/21+1/21)=

22/7 / 22/21=

22/7× 21/22=

1/3

g)

(1 2/3) / (4 1/6) =

(3/3+2/3)/ 4×6/6+1/6=

5/3 / 25/6=

5/3× 6/25=

2/5

h)

21/125 / 14/5=

21/125 × 5/14=

3/10

i)

2/ (6/9)=

2×9/6=

18/6=

3

j) (2/6) /9=

2×1 / 9×6=

1/27

k)

(3 5/6) / (1 11/12)=

(3×6/6+5/6) / (12/12+11/12)=

(23/6) / (23/12)=

23/6×12/23=

(23 ×12)/( 6×23)=

2

Explicație pas cu pas:

Răspuns de Jurconi
1

Răspuns:

Atasat ai rezolvarea exercitiilor.

Explicație pas cu pas:

Anexe:
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