Question

(-15)+(-*)=-23 (-3,25)+(-*)=-4 Вместо звездочек поставить такое число, чтобы равенство было верным

Answer 1

1)-23+15=-8

-15+(-8)=-23

2)-4+3,25=-0,75

-3,25+(-0,75)=-4

Answer 2

(-15)+(-8)=-23
-23--15=-8
(-3,25)+(-0,75)=-4
-4-3,25=0,75

Answer 3

To solve the equations, we need to find the missing numbers denoted by the asterisks.

1. (-15) + (-*) = -23 Let's find the value of the missing number denoted by the asterisk:

(-15) + (-*) = -23

To solve for *, we need to isolate it on one side of the equation. Since both numbers on the left side are negative, we can add them together:

(-15 - *) = -23

Now, we'll bring -15 to the other side by changing its sign (it becomes positive):

• = -23 + 15
• = -8

So, the missing number is -8.

2. (-3,25) + (-*) = -4 Again, let's find the value of the missing number represented by the asterisk:

(-3.25) + (-*) = -4

To solve for *, we perform the following steps:

(-3.25 - *) = -4

Now, bring -3.25 to the other side by changing its sign:

• = -4 + 3.25
• = -0.75

Thus, the missing number is -0.75.

So, in order for the equations to be valid, the missing numbers represented by the asterisks should be:

1. • = -8
2. • = -0.75