Question

Buna seara!
(-7/-12+3/8)*(-8/-15)+(-7/-24)*(16/21).
Cine ma descurca? Multumesc,anticipat!

Answer 1

Explicație pas cu pas:

(-7/-12 + 3/8) • (-8/-15) + (-7/-24) • (16/21) =

(-)/(-) = (+)

(7/12 + 3/8) • 8/15 + 7/24 • 16/21 =

(2•7/24 + 3•3/24) • 8/15 + 1/24 • 16/3=

(14/24 + 9/24) • 8/15 + 1/3 • 2/3 =

23/24 • 8/15 + 2/9 =

23/3 • 1/15 + 2/9 =

23/45 + 2/9 =

23/45 + 2•5/45 =

23/45 + 10/45 =

33/45 =

11/15

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