Задача 63324 306. Вычислите. a) (14/15 + 2 1/2 + 0,...

621396ab2c8c0049a5f74ce7

21.02.2022 16:44:02

306. Вычислите. a) (14/15 + 2 1/2 + 0, 3) * 8/7 * 3/4 + 0, 5 b) (0, 5 + 1/8 - 1/6)(6, 4 / (26 2/3)) + 0, 125

5f3ea7e3faf909182968ddd9

21.02.2022 16:56:44

★

06.
a) ([blue]14/15 + 2 1/2 + 0, 3[/blue]) · 8/7 · 3/4 + 0, 5=([blue](14/15)+(5/2)+(3/10)[/blue])· 8/7 · 3/4 + 0, 5=

=([blue](14*3/30)+(5*15/30)+(3*3/30)[/blue])· 8/7 · 3/4 + 0, 5=([blue](42+75+9)/30[/blue]) 8/7 · 3/4 + 0, 5=

=(([blue](126/30[/blue]) 8/7 · 3/4 + 0, 5=(126*8*3)/(30*7*4)+0,5=(36/10)+0,5=3,6+0,5=[b]4,1[/b]




b) (0, 5 + 1/8 – 1/6)*(6, 4 : (26 2/3)) + 0, 125=([blue](1/2)+(1/8)-(1/6)[/blue])*(6, 4 : (26 2/3)) + 0, 125=

=([blue](12/24)+(3/24)-(4/24))[/blue])*(6, 4 : (80/3)) + 0, 125=([blue](12+3-4)/24[/blue])*(6,4*(3/80)+0,125=

=(11/24)*(64/10)*(3/80)+0,125=(11*64*3)/(24*10*80)+0,125=(11/100)+0,125=0,11+0,125=[b]0,235[/b]