RIF12
29.11.2021 16:45

5. Составь и запиши выражения по таблицам. Найди их значения, а) Слагаемое
Слагаемое
Значение суммы
125
41.2
120.3 606:3
505:5 120.2
450
25.4
8200
320
6)
660
4.250
400
909:3
850
Уменьшаемое
Вычитаемое
Значение разности
330 : 3
2.500
60.3
101.2 123.0​

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Ответ:
Galerina
19.03.2021 11:54

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Ответ:
Gutlock
21.04.2022 11:11

Смотрите.

1) Обозначаем t — сколько времени они шли в первый день, тогда (t-1) — сколько во второй.

2) Теперь следующее соотношение — про 6 километров. Пускай в первый день они км, а во второй день — s2, тогда нам дано:

s1-s2=6.

3) Вспоминая, что расстояние=время*скорость (s=v*t), подставляем в эту формулу вместо s1 и s2:

(3,5*t)-(3*(t-1))=6.

Упрощаем:

3,5t-3t+3=6;

0,5t=3;

t=6.

ответ: Таким образом, в первый день они шли 6 часов. Во второй день — 6-1=5 (часов во второй день — 3*5 = 15 (км)

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