Operations with Rational Numbers — Test

Question 7 • Grade 7 Mathematics

Which number line correctly shows 4 point 5 minus 2 point 5 ?

Answer

Image with description A number line from 0 to 4 point 5 by halves. A ray extends from 0 to 4 point 5. A second ray above the first ray extends from 4 point 5 to 2.

Image with description A number line from negative 4 point 5 to 2 point 5 by halves. A ray extends from 2 point 5 to 0. A second ray extends from 0 to negative 4 point 5.

Image with description A number line from negative 4 point 5 to 0 by halves. A ray extends from 0 to negative 4 point 5. A second ray above the first ray extends from negative 4 point 5 to negative 2.

Image with description A number line from negative 2 point 5 to 4 point 5 by halves. A ray extends from negative 2 point 5 to 0. A second ray extends from 0 to 4 point 5.

Explanation

To show 4.5 − 2.5 on a number line, start at 0 and move right to 4.5. Then subtract 2.5 by moving left from 4.5 to 2, since 4.5 − 2.5 = 2. Choice A shows those moves.

AI-written and checked against the verified answer.

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