Common Core
HSN.Q.A.3
3 lessons teach this standard. Every lesson is interactive, and every one prints as a worksheet with a separate answer key.
Money Around the World · Chapter 4 · Lesson 2
A percent fee and a flat fee favour different amounts.
Money Around the World · Chapter 4 · Lesson 3
Budget in the money you will spend, then convert once.
Measuring Around the World · Chapter 4 · Lesson 3
Line up the factors so the units cancel, and the answer falls out.