Предмет: Математика, автор: viktoriyabonda5

помогите пж очень прошу 2варіант​

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Ответы

Автор ответа: ludmilaksenija2005
0

Пошаговое объяснение:

1

a)

40 — 1 ч

Х -— 7/8

Х=40×7/8=35

б)

30×3/5=18

в)

45×10/9=50

г)

12/25×1/4=0,12

Д)

а — 100%

Х —9%

Х=9×а : 100=0,09а

2

а)

3/4 ч —27

1 ч— х

Х=1×27:3/4=27×4/3=36

б)

10/3 ч — 15

1 ч — х

Х=1×15:10/3=15×3/10=4,5

в)

30 %— с

100% —х

Х=с×100:30=10/3×с

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