Лучший Ответ:
1) ( 1/2 + 1/3 ) × ( 1/5 - 1/4 ) = 5/6 * ( -1/20) = -1/24
2) 4 2/3 + 1/4 × ( 1 7/9 - 4/9 ) = 4 2/3 + 1/4 * 13/9 = 4 2/3 + 13/36 = 4 37/36 = 5 1/36
3) ( 3 1/3 × 3² - 17 ) : 13 - 0,07 = ( 3 1/3 * 9 - 17 ) : 13 = ( 30 - 17 ) : 13 = 13 : 13 = 1
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Лучший Ответ:
1) ( 1/2 + 1/3 ) × ( 1/5 - 1/4 ) = 5/6 * ( -1/20) = -1/24
2) 4 2/3 + 1/4 × ( 1 7/9 - 4/9 ) = 4 2/3 + 1/4 * 13/9 = 4 2/3 + 13/36 = 4 37/36 = 5 1/36
3) ( 3 1/3 × 3² - 17 ) : 13 - 0,07 = ( 3 1/3 * 9 - 17 ) : 13 = ( 30 - 17 ) : 13 = 13 : 13 = 1