Question

√508 Найдете значение выражения 1)2/5+1 1/4a при a 1 3/5

2)2 3/10b+1/2 при b =2 1/2​

Answer 1

Ответ:

Пошаговое объяснение:

1) 2/5 + 1 1/4a при a = 1 3/5

2/5 + 1 1/4 * 1 3/5 = 2/5 + 5/4 * 8/5 = 2/5 + 2 = 2 2/5

2) 2 3/10b + 1/2 при b =2 1/2​

2 3/10 * 2 1/2 + 1/2 = 23/10 * 5/2 + 1/2 = 23/4 + 1/2 = 5 3/4 + 1/2 =

= 5 3/4 + 2/4 = 5 5/4 = 6 1/4

Answer 2

Пошаговое объяснение:

№1

а = 1 3/5

2/5 + 1 1/4а = 2/5 + 1 1/4 * 1 3/5 =

2/5 + 5/4 * 8/5 = 2/5 + 1/1 * 2/1 =

2/5 + 2/1 = 2/5 + 2 = 2 2/5

№2

в = 2 1/2

2 3/10в + 1/2 = 2 3/10 * 2 1/2 + 1/2 =

23/10 * 5/2 + 1/2 = 23/2 * 1/2 = 23/4 + 1/2 =

23/4 + 2/4 = 25/4 = 6 1/4