To multiply a decimal number by a whole number
Ignore the decimal point and multiply the digits. Place the decimal point in the answer so that it has the same number of decimal places as the number being multiplied
Ex: 2.22 X 43 = 95.46
Multiply Decimals by X
Multiply Decimals by powers of ten
0.5 x 10 = 5
0.5 x 100 = 50
0.5 x 1000 = 500
0.5 x 10000 = 5000
Hint: Just move the decimal point one place to the right for each zero you see after the 1
To multiply a decimal by a power of ten, just move the decimal point to the right as many times as there are 0’s. (Add 0’s if there are not enough digits).
Multiply Decimals by Powers of 10
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
Multiply decimals
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