Предмет: Математика, автор: Аноним

Обчисліть:
1) 5 ∙ (100 – 1);
3) 3 ∙ 17 – 3 ∙ 27;
2) –7 ∙ 23 + 8 ∙ 23;
4) –17 ∙ 7 + (–17) ∙ 3.

Ответы

Автор ответа: laapysik

В примерах применяется распределительное свойство умножения (выносится общий множитель за скобку)

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Cu + O2 =
CuO –
Mr( CuO)=
Na2O + H2O =
Na2O –
NaOH –
Mr(Na2O) =
Mr(NaOH) =

Обчисліть: 1) 5 ∙ (100 – 1); 3) 3 ∙ 17 – 3 ∙ 27; 2) –7 ∙ 23 + 8 ∙ 23; 4) –17 ∙ 7 + (–17) ∙ 3.

Ответы

Обчисліть:
1) 5 ∙ (100 – 1);
3) 3 ∙ 17 – 3 ∙ 27;
2) –7 ∙ 23 + 8 ∙ 23;
4) –17 ∙ 7 + (–17) ∙ 3.