Fractions and Decimals Concepts

Which of the following is NOT considered a rational number?

• Whole numbers

• Integers

• Terminating decimals

• Numbers that cannot be expressed as a simple fraction

What is the essential first step when adding or subtracting fractions with different denominators?

• Multiply the numerators.

• Find a common denominator.

• Convert fractions to decimals.

• Divide the denominators.

What is the least common multiple (LCM) of 3 and 6?

• 3

• 6

• 9

• 18

To convert -8/3 to an equivalent fraction with a denominator of 6, what operation should be applied to both the numerator and the denominator?

• Multiply by 2

• Divide by 2

• Add 3

• Subtract 3

After converting -8/3 to -16/6, what is the sum of -16/6 + 5/6?

• -21/6

• -11/6

• 11/6

• 21/6

What is the mixed number equivalent of the improper fraction -11/6?

• -1 1/6

• -1 5/6

• -2 1/6

• -2 5/6

When adding or subtracting decimals, what is the most crucial step to ensure accuracy?

• Round the decimals to the nearest whole number.

• Align the decimal points.

• Convert decimals to fractions.

• Ignore the decimal points until the end.

When adding a negative decimal and a positive decimal, how is the sign of the result determined?

• The result is always positive.

• The result is always negative.

• The result takes the sign of the decimal with the larger absolute value.

• The result takes the sign of the first decimal in the expression.

What is the initial step when evaluating an algebraic expression like 2x + y, given specific values for x and y?

• Simplify the expression first.

• Substitute the given values for the variables.

• Multiply all numbers together.

• Find the least common multiple.

Evaluate the expression 2x + y when x = 1/4 and y = -3/2.

• 1/2

• -1/2

• 1

• -1