4th Grade Multiplying a Fraction by a Whole Number Quiz: 10 Questions with Explanations

Three fourths is 3 pieces of one fourth, so it is \(3 \times \frac{1}{4}\).

Multiply the numerator: \(4 \times 1\) = 4. The denominator stays 5.

There are 3 groups of 2 fifths, which is 6 fifths. The denominator is not multiplied.

\(5 \times 3\) = 15 eighths. Multiplying the denominator by 5 is the common mistake.

\(6 \times 2\) = 12 thirds, and 12 thirds is 4 wholes. Forgetting the denominator gives 12.

Each jump is \(\frac{3}{4}\), so the jumps land at \(\frac{3}{4}\), \(\frac{6}{4}\) and \(\frac{9}{4}\).

\(2 \times 7\) = 14 tenths. Adding 2 to the numerator gives 9.

Nine fourths is 9 copies of one fourth.

\(4 \times \frac{3}{4}\) = \(\frac{12}{4}\) = 3 cups. The denominator stays 4.

\(5 \times \frac{2}{3}\) = \(\frac{10}{3}\), which is 3 \(\frac{1}{3}\) miles.