Matthew spends 5 hours per day pruning a bonsai tree over x days for a total of 10 hours and 5 hours per day of pruning. Use an equation to express the total number of hours spent pruning. \(5 \, \times \, x \, = \, 10\)

\(5 \, \times \, x \, = \, 10\)

Logan is a weightlifter and can lift 8 kilograms in a deadlift. To be considered strong, Logan must be able to deadlift 10 kilograms. How many kilograms does he need to add to his deadlift to be strong? Use an equation to express the answer. \(8 \, + \, x \, = \, 10\)

\(8 \, \times \, x \, = \, 10\)

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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