Предмет: Математика, автор: Kosh122

решите 2 задания пж
354. Решите задачу с помощью координатной прямой:
Температура воздуха утром была 2°C, а к вечеру она стала равной -4°С. На сколько градусов изменилась температура воздуха за день?

355. На рисунке 2.36 (фото прикреплено) показаны перемещения точки по координатной прямой.
• Запишите эти перемещения числовыми выражениями.
• Найдите значения этих выражений.

Приложения:

Ответы

Автор ответа: Imegamind
3

Ответ:

354.

утром- 2°С

вечером- -4°С

давайте отметим эти точки на координатной прямой:

А(2);

В(-4);

      B                 O       A

          6 ед. отрезков

       |----------------------------|

--------|----|----|----|----|----|----|----|------------->

      -4 -3  -2  -1   0   1    2   3

так как |2-(-4)|=|2+4|=|6|=6(ед. отрезков)

355.

a)-12+20-26=-12-(26-20)=-12-6=-18

б)6-18+24=6+(24-18)=6+6=12

в)9-23+18=9-(23-18)=9-5=4

г)-12+26-19=-12+(26-19)=-12+7=-5

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