Question

find each quotient. use mental math.
$122.1 \div 10^{3}$
$122.1 \div 10^{2}$
$122.1 \div 10^{1}$
$122.1 \div 10^{0}$

$122.1 \div 10^{3} = \square$
$122.1 \div 10^{2} = \square$
$122.1 \div 10^{1} = \square$
$122.1 \div 10^{0} = \square$
(type whole numbers or decimals.)

Explanation:

Step1: Divide by $10^3$ (shift left 3)

$122.1 \div 10^3 = 0.1221$

Step2: Divide by $10^2$ (shift left 2)

$122.1 \div 10^2 = 1.221$

Step3: Divide by $10^1$ (shift left 1)

$122.1 \div 10^1 = 12.21$

Step4: Divide by $10^0$ (any ÷1=itself)

$122.1 \div 10^0 = 122.1$

Answer:

$122.1 \div 10^3 = 0.1221$
$122.1 \div 10^2 = 1.221$
$122.1 \div 10^1 = 12.21$
$122.1 \div 10^0 = 122.1$