Circle Sums  Solve for Values of Unknowns
Teacher Notes
Circle Sums show threebythree grids of circles that contain either letters that represent unknown quantities or numbers. Arrows point to sums of rows and columns. For example, in Row 1, , and in Column 1, . Students use grid relationships to figure out the values of the letters. Each grid contains three different letters and one number. Note: There is often more than one solution path.
Solutions




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.