Question

FOARTE URGENT AJUTOR

Calculati si scrieti rezultatul in forma de fractie ordinara:

a) 2,52 * 0,(3);
 
b) 5/7 * 2,8;

c) 5/9 * 7,2;

d) 4,(3) + 4,(2);

e) 9/38 * 4,(2);

f) 1,2(1) * 100/90.

Answer 1

a) 2,52 x 0,(3)= 252/100x3/9=63/25x1/3=21/25

b) 5/7 x 2,8=5/7x28/10=5/7x14/5=2

c) 5/9 x 7,2=5/9x72/10=5/9x36/5=4

d) 4,(3) + 4,(2)=39/9+38/9=77/9

e) 9/38 x 4,(2)=9/38x38/9=1

f) 1,2(1) x 100/90=109/90x100/90=109/90x10/9=1090/810=109/81