Предмет: Математика, автор: АлЁнКо2002

Помогите решить задачи!Срочно! С объяснением

а)Верёвки,длины которых 5м6дм и 4м8см,связаны узлом.На завязывание этого узла от каждой верёвки пошло 8см длины.Какой длины получилась веревка.

б)Длина одного куска провода 16м50см,a друкого на 4м70смменьше.Чему равна длина обоих кусков провода.

Ответы

Автор ответа: Соффочка
0

Переводим все в сантиметры

5м6дм=560 см

4м8см=408см

8+8=16см ушло на узел с 2х веревок

(560+408)-16=952(см)

Ответ: веревка получилась длинной 952 см или 9м52см

 

16м50см-4м70см=11м80см длина второго куска

16м50см+11м80см=28м30см

Ответ: длина обоих кусков 28м30см

Автор ответа: el2608
0

а) 5м6дм= 560 см

    4м8см=408 см

560-8=552 см - 1 веревка

408-8=400 см - 2 веревка

552+400=952 см =9м5дм2см

либо 560+408-8*2=952 см

б) 16м50см=1650см - 1 кусок

1650-470=1180 см - 2 кусок

1650+1180=2830см=28м3дм

 

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