Multiply Small Decimal Numbers by 10.
Multiply Decimals by Powers of 10.
Review Rules Multiply Decimals.
Use the area diagram below to multiply the numbers, (4.6) · (0.9). First decompose each number into its base ten units and write them in the boxes on each side of the rectangle. Write the area of each lettered region in the diagram. Then find the area of the entire rectangle.
Here are an unfinished calculation of (0.54) · (3.8) and 0.54-by-3.8 rectangle.
(1.) Which part of the rectangle has an area of 0.432? Which part of the rectangle has an area of 1.62? Show your reasoning in the applet above.
(2.) What is (0.54) · (3.8)?
Explain how the product of 3 and 65 could be used to find (0.03) · (0.065)?