Multiplying and Dividing Rational Numbers Explained

The video tutorial covers various math exercises, including subtraction, multiplication of decimals, and adding fractions. It explains the rules for multiplying and dividing rational numbers, emphasizing the importance of sign consistency. The tutorial also introduces the Keep Change Flip method for dividing fractions and demonstrates operations with decimals, including handling repeating decimals. The session concludes with a reminder to apply these rules only to multiplication and division, not addition and subtraction.

What is the result of 2 minus negative 6?

• -4

• 4

• 8

• -8

When multiplying 3.4 by 0.5, what is the correct placement of the decimal in the product?

• 17

• 170

• 1.7

• 0.17

What is the lowest common multiple (LCM) of 3 and 7?

• 10

• 14

• 21

• 28

What is the result of adding 7/21 and -12/21?

• 19/21

• -19/21

• -5/21

• 5/21

What is the rule for the sign of the product when multiplying two negative rational numbers?

• Positive

• Negative

• Zero

• Undefined

What is the result of dividing a positive rational number by a negative rational number?

• Undefined

• Zero

• Negative

• Positive

What is the first step in the Keep Change Flip method for dividing fractions?

• Change the first fraction

• Keep the first fraction

• Multiply the fractions

• Flip the first fraction

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

• -15/9

• 10/9

• 15/9

• -10/9

What is the result of dividing 5.2 by 3.9?

• 1.3333

• 1.333

• 1.33

• 1.3

What is the fraction equivalent of the repeating decimal 1.3333...?

• 1 and 2/3

• 1/3

• 1/2

• 1 and 1/3