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Автор - ravana47

Найди неизвестные числа.
1)х:10×5:2:50×4 = 20
2)Х× 3×2×90 : 100 : 3 = 27
3)х: 5×2:4:8×90 = 450​

Ответ

Автор - yakovvs2005

Відповідь:

Покрокове пояснення:

1)x=20÷4×50×2÷5×10

x=1000

2)x=27×3×100÷90÷2÷3

x=15

3)x=450÷90×8×4÷2×5

x=400

Ответ

Автор - matilda17562

Ответ:

1) 1000;

2) 15;

3) 400.

Пошаговое объяснение:

1)х:10×5:2:50×4 = 20

х:10×5:2:50 = 20:4

х:10×5:2:50 = 5

х:10×5:2 = 5•50

х:10×5:2 = 250

х:10×5= 250•2

х:10×5 = 500

х:10 = 500:5

х:10 = 100

х = 10•100

х = 1000

Ответ: 1000.

Проверка:

1000:10×5:2:50×4 = 20 - верно.

2)х× 3×2×90 : 100 : 3 = 27

х× (3×2×90 ): (100•3) = 27

х× 540 : 300 = 27

х× 540 = 27•300

х× 540 = 8100

х = 8100 : 540

х=15

Ответ: 15.

Проверка:

15×3×2×90 : 100 : 3 = 27

3)х:5×2:4:8×90 = 450​

х:5×2:4:8 = 450​:90

х:5×2:4:8 = 5

х:5×2:(4•8) = 5

х:5•2:32 =5

х:5•2=5•32

х:5•2=160

х:5=160:2

х:5=80

х=80•5

х = 400

Ответ: 400.

Проверка:

400:5×2:4:8×90 = 450​

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