Question

Срочно Виконати множення: 1)-2,5*4; 2)5*(-4,2); 3)-10*(-6,3); 4)2,8*(-5)

Answer 1

Ответ:

1) -2,5*4= -10

2) 5*(-4,2)= -21

3) -10*(-6,3)= 63

4) 2,8*(-5)= -14

Answer 2

I can help you with your math problems. Here are the answers:

1) $$-2.5 \times 4 = -10$$ 2) $$5 \times (-4.2) = -21$$ 3) $$-10 \times (-6.3) = 63$$ 4) $$2.8 \times (-5) = -14$$

To multiply two numbers, you need to multiply their absolute values and then assign the sign of the product based on the signs of the factors. If both factors have the same sign, the product is positive. If the factors have different signs, the product is negative. For example, $$-2.5 \times 4 = -10$$ because both factors are negative, so the product is positive. But $$5 \times (-4.2) = -21$$ because the factors have different signs, so the product is negative.