# 8.4: Circle Sums

**Circle Sums – Solve for Values of Unknowns**

**Teacher Notes**

Circle Sums show grids in which circles contain letters that represent unknowns. Arrows point to sums of rows and columns. For example, in Row 1, , and in Column 1, . Students use the grid relationships to figure out the values of the letters. Each grid contains four different letters.

**Solutions:**

**Circle Sums – Solve for Values of Unknowns**

The arrows point to the sum of each row or column. Figure out the value of each letter.

1. The arrows point to the sum of each row or column. Figure out the value of each letter.

2. The arrows point to the sum of each row or column. Figure out the value of each letter.

3. The arrows point to the sum of each row or column. Figure out the value of each letter.

4. The arrows point to the sum of each row or column. Figure out the value of each letter.

*Extra for Experts:***Circle Sums – Solve for Values of Unknowns**

1. The arrows point to the sum of each row or column. Figure out the value of each letter.

2. The arrows point to the sum of each row or column. Figure out the value of each letter.

3. The arrows point to the sum of each row or column. Figure out the value of each letter.

4. The arrows point to the sum of each row or column. Figure out the value of each letter.

**Solutions:**