Fill in the missing number:
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Fill in the missing number:
Let's remember the rule:
Let's think about what number we need to multiply by 3 to get 15:
Now let's put the numbers together with the appropriate sign as written in the rule above as follows:
What will be the sign of the result of the next exercise?
\( (-2)\cdot(-4)= \)
Remember the sign rules! Since , we need a positive number. Negative times positive gives negative: .
Since we have multiplication with a missing factor, use division! Divide the product by the known factor: .
Think step by step: What times 3 gives 15? That's 5. Now apply signs: negative times positive gives negative, so .
Yes! Use the opposite operation. Since , then and .
Think of it as opposite directions! When you divide two negatives, you're going in the 'opposite of opposite' direction, which brings you back to positive. .
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