6A 3.1.1a Intro to Signed Numbers

Front

What are signed numbers?

Back

Signed numbers are numbers that have a positive or negative sign. They are used to represent values above (positive) or below (negative) zero.

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What does a positive sign (+) indicate?

Back

A positive sign indicates that the number is greater than zero.

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What does a negative sign (-) indicate?

Back

A negative sign indicates that the number is less than zero.

Front

How do you add two positive numbers?

Back

To add two positive numbers, simply combine their values. For example, 3 + 5 = 8.

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How do you add a positive number and a negative number?

Back

To add a positive number and a negative number, subtract the smaller absolute value from the larger absolute value and keep the sign of the number with the larger absolute value. For example, 5 + (-3) = 2.

Front

How do you add two negative numbers?

Back

To add two negative numbers, combine their absolute values and keep the negative sign. For example, -3 + (-5) = -8.

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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. For example, the absolute value of -4 is 4.

Front

What is the result of subtracting a negative number from a positive number?

Back

Subtracting a negative number is the same as adding its positive counterpart. For example, 5 - (-3) = 5 + 3 = 8.

Front

What is the result of subtracting a positive number from a negative number?

Back

Subtracting a positive number from a negative number results in a more negative number. For example, -5 - 3 = -8.

Front

What is the rule for multiplying two signed numbers with the same sign?

Back

When multiplying two signed numbers with the same sign (both positive or both negative), the result is positive. For example, 3 * 2 = 6 and (-3) * (-2) = 6.