Divide decimals by powers of ten
0.5 ÷ 10 = 0.05
0.5 ÷ 100 = 0.005
0.5 ÷ 1000 = 0.0005
0.5 ÷ 10000 = 0.00005
You can divide by powers of 10 simply by moving the decimal point one space to the left for every zero in the power of 10 that you are dividing by. (Add 0’s if there are not enough digits).
To multiply a decimal number by a decimal number
Ignore the decimal points and multiply the digits; count the total number of decimal places in both decimal numbers being multiplied; and place a decimal point in the answer so that it has the same number of decimal places as the total number of decimal places in the two numbers being multiplied
To divide a decimal number by a whole number
In order to divide the given decimal number by the given whole number use Long Division (ignore the decimal value). Now place the decimal value at the place the dividend has before.
Divide_1D_W (1-digit decimal divided by a whole number)
Divide_2D_W (2-digit decimal divided by a whole number)
Divide_3D_W (3-digit decimal divided by a whole number)
To divide a decimal number by a decimal number
Move the decimal point in the divisor to the right until it is a whole number.
Move the decimal point in the dividend to the right by the same number of places as the decimal point was moved to make the divisor a whole number.
Then divide the new dividend by the new divisor