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Example1

Title: Subtracting signed numbers

Grade 6+ Lesson s1-l3

Explanation: The best way to understand algebra is by looking at some examples. Take turns and read each example for easy understanding.

Examples

Topics → Definition Example1 Example2

Subtract 8 from 3.

Step 1

Subtracting a number is the same as adding its opposite:

3 − 8 = 3 + (−8)

Explanation:

Here, we rewrite as the addition of the opposite.

Step 2

When signs are different, subtract the smaller absolute value from the larger absolute value, and keep the sign of the larger number:

\$\∣3\∣=3\$

\$\∣−8\∣=8 \$

3 + (−8) = -5

So, the answer is -5.

Explanation:

Here, we apply the rule for adding signed numbers, and then we get the answer of -5.