Multiplication and Division of Signed Mumbers: Complete the missing numbers

Let's pay attention to the exercise on the left side of the page in terms of the plus and minus signs.

The exercise looks like this:

$-:\text{?}=$

In other words, we need to divide by a number that will give us a result smaller than 0, therefore:

$-:+=-$

- < 0

So the answer is $+4$

Let's pay attention to the exercise on the left side of the page in terms of the plus and minus signs.

The exercise looks like this:

$-:\text{?}=$

Our result needs to be less than zero, and therefore we need a positive number in order to get a negative result.

Therefore:

$-:+=-$

- < 0

So the answer is $+78$

Let's pay attention to the exercise on the left page regarding the plus and minus signs.

The exercise looks like this:

$-:-\text{:?}=$

If we solve the equation from left to right, we can see that we first divide a negative number by a negative number, so the result will be positive:

$-:-=+$

This means that now we need to divide a positive number by some number that will give us a result greater than 0, therefore:

$+:+=+$

+ > 0

Therefore the answer is $+3.3$

Let's pay attention to the exercise on the left side in terms of plus and minus signs.

The exercise looks like this:

$-:-\text{:?}=$

If we solve the equation from left to right, we can see that we first divide a negative number by a negative number.

This means the result we get is a positive number:

$-:-=+$

Now the remaining exercise is:

$+:?=$

Our result needs to be greater than zero, and therefore we need a positive number, in order to get a positive number in the exercise.

Therefore:

$+:+=+$

+ > 0

Therefore the answer is $+35$

Let's pay attention to the exercise on the left side in terms of plus and minus signs.

The exercise looks like this:

$-:-:?=$

If we solve the equation from left to right, we can see that we first divide a negative number by a negative number, therefore:

$-:-=+$

Now the exercise is:

$+:\text{?=}$

Our result needs to be greater than zero, and therefore we need a positive number, in order for the number to be positive.

Therefore:

$+:+=+$

+ > 0

Therefore the answer is $+\frac{1}{90}$

Let's pay attention to the exercise on the left side in terms of plus and minus signs.

The exercise looks like this:

$+:\text{?:}+=$

If we solve the equation from left to right, we can see that we first divide a positive number by some number:

$+:\text{?}$

Since the next operation is also division by a positive number, we need a negative number in order for the result to be less than 0:

$+:-:+=$

$-:+=-$

- < 0

Therefore the answer is $-40$

Let's pay attention to the exercise on the left side in terms of plus and minus signs.

The exercise looks like this:

$-:\text{?:}+=$

If we solve the equation from left to right, we can see that we first divide a negative number by some number:

$-:\text{?}$

Our result needs to be greater than zero, and therefore our first operation must give us a positive number, so that in the final operation the resulting number will be positive.

Therefore:

$-:-:+=$

$+:+=+$

+ > 0

Therefore the answer is $-\frac{1}{4}$

Let's pay attention to the exercise on the left side in terms of plus and minus signs.

The exercise looks like this:

$?:+:+=$

If we solve the equation from left to right, we can see that we first divide a number by a positive number:

$?:+=$

If we use a positive number, we'll get a positive number, and then in the next exercise, dividing a positive number by a positive number would result in a number greater than zero.

Therefore, we need to divide a negative number by a positive number in order to get a negative number.

Therefore:

$-:+=-$

$-:+=-$

- < 0

Therefore the answer is $-98$