Question

Calculați în două moduri : a) 3/5 * (1/9 + 4/9) b) 2/3 * (1/6 + 5/24) c) 1/7 * (7/15 - 3/10) ​

Answer 1

Răspuns:

Am rezolvat eu un mod

Sper ca te-am ajutat)))

Succes!

Answer 2

Răspuns:

Explicație pas cu pas:

I

a) 3/5 * (1/9 + 4/9) = 3/5 *5/9 = 3/9=1/3

b) 2/3 * (1/6 + 5/24) = 2/3 * 9/24 = 3/12=1/4

c) 1/7 * (7/15 - 3/10) ​= 1/7 *5/30 =5/210=1/42

II

a) 3/5 * (1/9 + 4/9) = 3/5 *1/9 + 3/5 *4/9 = 1/15 + 4/15 =5/15=1/3

b) 2/3 * (1/6 + 5/24) = 2/3*1/6 +2/3*5/24=2/18 +10/72 = 18/72=1/4

c) 1/7 * (7/15 - 3/10) ​=1/7 *7/15 -1/7 *3/10 = 1/15 -3/70= 5/210= 1/42