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MF.NS.4 Standard MF-004-A10-V02

Use commutative, associative, and distributive structure to rewrite and simplify numerical expressions efficiently.

Recognize an equivalent structural rewrite

Problem

Rewrite \(25~+~18~+~5\) by regrouping only, without changing the order of the addends. Your rewrite should show the associative property with parentheses. Do not find the final sum.

Side-by-side comparison for regrouping 25 + 18 + 5 using the associative property without changing order. The left panel shows the original expression and reminds students to keep the order 25, 18, 5. The right side shows four options: A. 25 + (18 + 5), B. (25 + 18) + 5, C. 25 + (5 + 18), and D. 48. Open full size
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Four variants of this problem type
Curriculum context
Standard
MF.NS.4
Category
Number Sense
Domain
Numerical Expressions
Objective
Use commutative, associative, and distributive structure to rewrite and simplify numerical expressions efficiently.
Problem type
Recognize an equivalent structural rewrite