V02D · Matched four-space paper

For sets of display pictures, there are 72 items in total and 9 items in each complete group. How many groups can be made? Show the grouping and label the answer.

Keep THIS full source attached. It is different from ordinary W practice or the eight-field Bench paper.

• My model

• My number sentence and strategy

• My check

• My useful message

Matching family vector; attach this selected source · Complete matching alternative