### General Information

**Related Standards:**MAFS.4.OA.1.a

**Reporting Category:**Operations and Algebraic Thinking

**Type:**MC: Multiple Choice

**Difficulty:**N/A

**Question:**

Which equation is true?

**Answer Options:**

A. 340 + 20 = 370 + 10

B. 340 + 30 = 350 + 10

C. 340 + 40 = 340 + 10

D. 340 + 50 = 380 + 10