Adding and subtracting rational numbers

Front

What is a rational number?

Back

A rational number is any number that can be expressed as the quotient or fraction of two integers, where the denominator is not zero.

Tags

CCSS.5.NBT.A.2

Front

What is the absolute value of a number?

Back

The absolute value of a number is its distance from zero on the number line, regardless of direction. It is always a non-negative value.

Tags

CCSS.6.NS.C.7C

Front

What is the opposite of a number?

Back

The opposite of a number is the number that is the same distance from zero but in the opposite direction on the number line.

Tags

CCSS.6.NS.C.6A

Front

How do you add two rational numbers with the same sign?

Back

When adding two rational numbers with the same sign, you add their absolute values and keep the sign.

Tags

CCSS.7.NS.A.1C

Front

How do you subtract rational numbers?

Back

To subtract a rational number, you add its opposite. For example, a - b is the same as a + (-b).

Tags

CCSS.7.NS.A.1B

Front

What is the result of -6.5 + (-0.5)?

Back

-7

Tags

CCSS.7.NS.A.1C

Front

What is the result of 8/15 + (-6/15)?

Back

2/15

Tags

CCSS.7.NS.A.1C

Front

What happens when you add a positive and a negative rational number?

Back

When adding a positive and a negative rational number, you subtract their absolute values and take the sign of the number with the larger absolute value.

Tags

CCSS.7.NS.A.1B

Front

What is the temperature change if it drops from 15 degrees to -12 degrees?

Back

-27 degrees

Tags

CCSS.7.NS.A.1C

Front

What is the rule for adding rational numbers with different signs?

Back

When adding rational numbers with different signs, subtract their absolute values and take the sign of the number with the larger absolute value.

Tags

CCSS.7.NS.A.1C