Adding and Subtracting Rational Numbers

Front

What is the least common denominator (LCD) of 6 and 9?

Back

The LCD of 6 and 9 is 18.

Front

1/4 - 3/10 = ?

Back

-1/20

Tags

CCSS.7.NS.A.1C

Front

What is -23.4 - 3.4?

Back

-26.8

Tags

CCSS.7.NS.A.1C

Front

When adding decimals with different signs, what do you do?

Back

Subtract and take the sign of the larger number.

Tags

CCSS.7.NS.A.1C

Front

When adding decimals with the same sign, what do you do?

Back

Add and keep the sign.

Tags

CCSS.5.NBT.B.7

Front

What is a rational number?

Back

A rational number is any number that can be expressed as a fraction a/b, where a and b are integers and b ≠ 0.

Tags

CCSS.5.NBT.A.2

Front

How do you add two rational numbers with different signs?

Back

Subtract their absolute values and take the sign of the number with the larger absolute value.

Tags

CCSS.7.NS.A.1C

Front

How do you subtract a rational number from another?

Back

To subtract a rational number, add its opposite.

Tags

CCSS.7.NS.A.1B

Front

What is the result of 5/8 + 1/4?

Back

The result is 7/8.

Tags

CCSS.4.NF.B.3C

CCSS.4.NF.B.3D

Front

What is the result of -1/3 + 2/3?

Back

The result is 1/3.

Tags

CCSS.7.NS.A.1C