解题---**Question Stem:** 填。(Fill in.) **Problem 1:** **Illustration Description:** A sequence of three rectangular diagrams connected by arrows. - The first rectangle is divided horizontally into 5 equal parts. The bottom 3 parts are colored blue, and the top 2 parts are white. - An arrow points from the first to the second rectangle. - The second rectangle is divided horizontally into 5 equal parts. The bottom 3 parts are blue, the next 2 parts are white. A hand holding a pencil is shown coloring in the two white parts blue. - An arrow points from the second to the third rectangle. - The third rectangle is divided horizontally into 5 equal parts. All 5 parts are colored blue. **Mathematical Expression:** 3/5 + 2/5 = **Problem 2:** **Illustration Description:** A sequence of three circular diagrams connected by arrows. Each circle is divided into 6 equal sectors. - The first circle is divided into 6 sectors. All 6 sectors are colored blue. - An arrow points from the first to the second circle. - The second circle is divided into 6 sectors. 4 sectors are colored blue. Two sectors are shown slightly separated and white. These separated sectors correspond to two of the original blue sectors. - An arrow points from the second to the third circle. - The third circle is divided into 6 sectors. 4 sectors are colored blue, and the remaining 2 sectors are represented by dotted lines. **Mathematical Expression:** 1 - 2/6 = **Other Relevant Text/Annotations:** - A red checkmark (✓) and the handwritten digit "1" are placed near the result area of the first equation. - A red checkmark (✓) and the handwritten fraction "4/6" (written as '4' above '6') are placed near the result area of the second equation.