Subtracting Integers with Mixed Signs

Subject: Math

Chapter: Adding and Subtracting Rational Numbers

CCSS Alignment: 7.NS.A.1.a, 7.NS.A.1.b, 7.NS.A.1.c...

Some days the temperature rises, and on others it falls. To describe these changes clearly, we can use integers. Suppose the temperature starts at 8°F and drops to 3°F.

The change in temperature can be written as 3 − 8. Subtraction of a number means adding its opposite, or the additive inverse. Here, negative eight is the additive inverse ...