{[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
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
