Multiplying Rational Numbers in 7th Grade Math

The video tutorial explains the rules for multiplying rational numbers, focusing on the signs of the products. It covers scenarios with positive and negative numbers, using examples like hiking and number lines to illustrate concepts. The tutorial also discusses the outcomes of multiplying numbers with the same signs and provides complex examples involving multiple negative numbers.

What is the result of multiplying a positive number by a negative number?

• Positive

• Negative

• Zero

• Undefined

If you multiply a negative number by a positive number, what will the sign of the product be?

• Undefined

• Zero

• Negative

• Positive

Jeanna hiked down a mountain in four sections, each section representing a descent of 1/2 mile. What is her total change in elevation?

• 1 mile

• 2 miles

• -2 miles

• -1 mile

Using a number line, what is the result of 2 times -3.5?

• 7

• -3.5

• 3.5

• -7

What is the result of multiplying two negative numbers?

• Positive

• Negative

• Zero

• Undefined

What is the result of -2 times -3.5?

• 3.5

• -3.5

• 7

• -7

What is the result of multiplying three negative numbers?

• Undefined

• Positive

• Negative

• Zero

If you have an even number of negative factors, what will the sign of the product be?

• Positive

• Negative

• Zero

• Undefined

If you have an odd number of negative factors, what will the sign of the product be?

• Positive

• Negative

• Zero

• Undefined

What is the result of multiplying -2/7 by -3/5?

• 1/5

• -1/5

• 6/35

• -6/35