Question

Ms. Nellies has 2 pints of vinegar for her students to use in a science experiment. Each

group of students needs pint of vinegar. Trey draws the number line model and writes the
equation below to help Ms. Nellies figure out how many 8-pint servings of vinegar she has.
Are Trey's number line model and equation correct?
at
NOW
HA
+
+
+
+
+
+
+
+
T~
25+ = 33
Click the arrows to choose an answer from each menu.
Trey's number line model is Choose... because it represents the expression
Choose... .. The correct equation is Choose...
Ms. Nellies has enough
vinegar for Choose... groups of students.

Answer 1

incorrect; 2½ ÷ ¾ = 3⅓; 2½ ÷ ⅜ = 6⅔; six

Explanation:

Assume that Trey's number line model is like the first one below.

That model is incorrect.

The distance from 0 to 1 has four tick marks, so each mark represents the fraction ¼.

Trey is jumping three of them (¾) at a time.

Trey's number line represents the expression

2½ ÷ ¾ = 3⅓

The correct number line model is the second one below.

It represents the expression

2½ ÷ ⅜ = 6⅔

Ms. Nellies has enough vinegar for six groups of students