(40:72-1/3)*2целы1/4+8/9
решите плиз 59 баллов даю
1) 40 ÷ 72 = 40/1 × 1/72 =40/72= 5/9 2)5/9 - 1/3 = (5 × 1 - 1 × 3)/9 = 5/9 - 3/9 = 2/9 3)2/9 × 2 1/4 = 2/9 × 9/4 =18/36= 1/2 4) 1/2+8/9= (1 × 9 + 8 × 2)/18 = 9/18 + 16/18 = 25/18 = 1 7/18 ответ 1 7/18
40/72 =5/9 5/9-1/3=5/9-3/9=2/9 2/9*2цел1/4=2/9*9/4=18/36=1/2 1/2+8/9=9/18+16/18=25/18= 1 цел 7/18