Question

Determină numarul rațional n=a÷b+C, unde:
A=1-2/5÷4/5+3:1 1/5
B=(2,6-2 1/3 × 6/7)×1 3/7
C=[4:(2-2/5)+1][7-(2:1/3)]
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Answer 1

A=1-2/5÷4/5+3:1 1/5= 11/10

B=(2,6-2 1/3 × 6/7)×1 3/7= 9/35

C=[4:(2-2/5)+1][7-(2:1/3)]= 7/2

n=a÷b+c

n=10/11÷9/35+7/2

n=1393/198

Răspuns: n=1393/198