Question

{[1,(3)]²+0,2(6) • 1,5}: 2,8 va rogg​

Answer 1

{[1,(3)]²+0,2(6) • 1,5}: 2,8=

[(13-1)/9 ^2 + (26-2)/90 × 15/10] ÷ 28/10=

[(12/9)^2 + 24/90 × 15/10] ×10/28=

(144/81 +4/10) ×10/28=

(1440+324)/810 × 10/28=

1764/81×1/28=63/81=7/9

Answer 2

Răspuns:

Explicație pas cu pas:

1,(3) = (13-1)/9 = 12/9 = 4/3

0,2(6) = (26 - 2)/90 = 24/90 = 4/15

1,5 = 15/10 = 3/2

2,8 = 28/10 = 14/5

________

(4/3)^2 = 16/9

4/15*3/2 = 2/5

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16/9 + 2/5 = 80/45 + 18/45 = 98/45

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98/45 : 14/5 = 98/45*5/14 = 7/9