Adding and Subtracting Decimals — Quiz

Question 4 • Grade 7 Mathematics

Which number line correctly shows negative 0 point 8 plus 0 point 6 ?

Answer

Image with description A number line from negative 1 point 6 to 1 point 6 by two-tenths. A ray extends from 0 to negative 0 point 8. A second ray above it extends from negative 0 point 8 to negative 0 point 2.

Image with description A number line from negative 1 point 6 to 1 point 6 by two-tenths. A ray extends from 0 to negative 0 point 8. A second ray extends from negative 0 point 8 to negative 1 point 4.

Image with description A number line from negative 1 point 6 to 1 point 6 by two-tenths. A ray extends from 0 to negative 0.6. A second ray above it extends from negative 0.6 to 0 point 2.

Image with description A number line from negative 1 point 6 to 1 point 6 by two-tenths. A ray extends from 0 to 0 point 8. A second ray extends from 0 point 8 to 1 point 4.

Explanation

Start at 0 and move 0.8 units left to represent −0.8. Then add 0.6 by moving 0.6 units right, landing at −0.2. Choice A shows a ray from 0 to −0.8 followed by a ray from −0.8 to −0.2.

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