To write a number in expanded form, we use place value. 8 is in the hundreds place; this makes its value 8(100)=800. 6 is in the tens place; this makes its value 6(10)=60. 3 is in the ones place; this makes its value 3(1)=3. 1 is in the tenths place; this makes its value 1(0.1)=0.1. 4 is in the hundredths place; this makes its value 4(0.01)=0.04. 1 is in the thousandths place; this makes its value 1(0.001)=0.001.