Students compare and contrast by multiplying two sets of whole numbers and decimals by writing the problem solving steps based on the place value, such as the following steps: for whole numbers,(1) multiply ones place (second row digit) by ones place (first row digit); (2) multiply ones place (second row digit) by tens place (first row digit), and (3) multiply ones place (second row digit) by hundreds place (first row digit)(4) multiply tens place (second row digit) by ones place (first row digi