Adding and Subtracting Rational Numbers

Mr. Buffington's lesson covers adding rational numbers, including integers, decimals, and fractions. The video explains the rules for adding numbers with the same and different signs, using a number line for visual learners. Practice questions are provided, with solutions to reinforce understanding. The lesson emphasizes the importance of understanding fractions as part of rational numbers.

What is the main focus of the lesson introduced by Mr. Buffington?

• Adding rational numbers

• Dividing rational numbers

• Multiplying rational numbers

• Subtracting rational numbers

Which of the following is NOT a rational number?

• -16

• 1/2

• √2

• 3.5

How does adding rational numbers differ from adding integers?

• Rational numbers are only whole numbers

• Rational numbers cannot be negative

• Rational numbers are always positive

• Rational numbers include decimals and fractions

On a number line, what is the result of adding -3.5, 9, and -4.5?

• 0

• 1

• 10

• 5

When adding two rational numbers with the same sign, what is the result?

• The sum is zero

• The sum keeps the sign of the numbers

• The sum is always negative

• The sum is always positive

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

• The result is always zero

• You subtract the numbers and keep the sign of the larger absolute value

• You always get a negative result

• You always get a positive result

In the example of 4.3 + (-2), what is the result?

• 2.3

• -2.3

• -6.3

• 6.3

What is the result of adding -10.3 and -8.6?

• 18.9

• 17.1

• -17.1

• -18.9

When adding fractions with the same denominator, what is the first step?

• Add the numerators

• Multiply the numerators

• Subtract the numerators

• Divide the numerators

What is the result of adding -10 3/5 and -4 1/5?

• 14 2/5

• -14 2/5

• 14 4/5

• -14 4/5