Fill in the missing number:
We have hundreds of course questions with personalized recommendations + Account 100% premium
Fill in the missing number:
Remember the following law:
Let's think about which number we need to multiply by 2 to get 8:
Now let's put the numbers together with the appropriate sign as written in the law above as follows:
Convert \( \frac{7}{2} \)into its reciprocal form:
When you multiply a positive number by a negative number, the result is always negative. Since 2 is positive and we need -8, the missing factor must be negative.
Use this pattern: Same signs = positive, Different signs = negative. Since (+2) × (?) = (-8), the signs are different, so ? must be negative.
Check your work! , not -8. You found the right number but forgot the negative sign.
Yes! Divide both sides by 2: . This is actually the fastest method for simple multiplication equations.
Substitute back into the original equation: . Since both sides equal -8, your answer is correct!
Get unlimited access to all 18 Signed Numbers (Positive and Negative) questions, detailed video solutions, and personalized progress tracking.
Unlimited Video Solutions
Step-by-step explanations for every problem
Progress Analytics
Track your mastery across all topics
Ad-Free Learning
Focus on math without distractions
No credit card required • Cancel anytime