Вычислите 1) (4 5/12-3 7/18):9,25+5/6 -------------------------------- ...

Question

Вычислите 1) (4 5/12-3 7/18):9,25+5/6
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(0,4+1/8+0,75)*2/3
2) 3 7/15*0,25+5/6-1 2/5
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5,4:(3/20+0,75)

Answer 1

1) (45/12-37/18) : 9.25+5/6=(15/4- 37/ 18) : 37/4+5/6 =
( (15·9-37·2 )/36 ) : ((37 /4)+ 5 /6 =
((135- 74))/ 36) ·(4\37)+5/6 =
(61/36 ) ·4/37 +5/6 =
(61 ·4) / (9·37)+5/6 =
(61 / (9·37)+5/6= 61/333_+5 / 6= (61·6+333·5)/333·6 =
(366+1665) / 1998 =2031 / 1998 = 677/666