
The teacher places a block in the 10-box and asks the child to find the block that goes with it to be as big as 10.
In this workbook page, children are asked to write the missing addend in the blanks. They draw on their knowledge of the blocks which went together in the 10-box. (From Structural Arithmetic Book I)


Teacher places the 6-block in the box. The teacher asks the children to find two blocks that are the same size as the 6 block and fit in the box.