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Let's start with the leftmost exercise:
We'll locate negative 4 on the axis and move two steps to the right, where each step represents one whole number:
We can see that we've reached negative 2.
Now we'll get the exercise:
Let's focus on the exercise:
We'll locate negative 2 on the axis and move three steps to the left, where each step represents one whole number:
We can see that we've reached negative 5.
Now we'll get the exercise:
We'll locate negative 5 on the axis and move five steps to the left, where each step represents one whole number:
We can see that we've reached negative 10.
What will be the sign of the result of the next exercise?
\( (-2)\cdot(-4)= \)
You might be ignoring the negative signs or treating them as subtraction. Remember: means negative four, not subtract four!
You can group them for easier calculation! Add negatives: , then add the positive: .
Start at -4, move right 2 steps to get -2, then move left 3 steps to get -5, finally move left 5 steps to reach -10.
There's no difference! Both mean adding negative three. The parentheses just make it clearer that we're adding a negative number.
Yes! Addition is commutative, so equals . The result is always -10.
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