There are 13 soda pops in the fridge. If Austin goes shopping and buys 8 more soda pops, which equation will tell us the total number of soda pops? \(?\)

\(x \, \times \, 13 \, = \, 8\)

\(13 \, \times \, 8 \, = \, x\)

Mackenzie and Angela collected seashells on the beach. Mackenzie found 19 shells. When Mackenzie and Angela put all of their shells together, they had 23 shells. Which equation, when solved, will show how many shells Angela found? \(?\)

\(23 \, \times \, 19 \, = \, x\)

\(x \, \times \, 23 \, = \, 19\)

Alyssa, the organ donating mutant, has 13 kidneys. If she grows 19 more then which equation will tell us how many kidneys she has now? \(?\)

\(19 \, \times \, 13 \, = \, x\)

\(x \, \times \, 19 \, = \, 13\)

Write Variable Equations to Represent - Grade 4

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Grade 4 - Patterns and Relations

Standard 4.PR.2 - Practice writing variable addition, subtraction, multiplication and division sentences to represent a word problem.

Included Skills:

Demonstrate an understanding of equations involving symbols to represent an unknown value by: writing an equation to represent a problem, solving one step equations.
• Explain the purpose of the symbol, such as a triangle or circle, in an addition, subtraction, multiplication, or division equation with one unknown (e.g. 36 ÷ ? = 6).
• Write an equation in symbolic form for a given pictorial or concrete representation.
• Identify the unknown in a story problem, represent the problem with an equation, and solve the problem concretely, pictorially, or symbolically.
• Create a problem in context for an equation with one unknown.
• Solve a one-step equation using manipulatives.
• Solve a one-step equation using guess and test.
• Explain what is meant by "one-step equation with one unknown".
• Represent and solve an addition or subtraction problem involving a "part-part-whole" or comparison context using a symbol to represent the unknown.
• Represent and solve a multiplication or division problem involving equal grouping or partitioning (equal sharing) using a symbol to represent the unknown.

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