Can any two decimals multiply to make a whole number?

Yes, they can . Suppose that 'a' is a whole number, while 'b' is any decimal number . Let c = a / b * (2b); c will be equal to '2a' which is definitely a whole number. And such example can grow very long. read more

When multiplying a decimal by a whole number, placement of the decimal point is very important. Since there are two decimal digits in the factor $18.75, there must be two decimal digits in the product $3,750.00. This is because hundredths x whole number = hundredths. read more

Any number times 0 is 0, therefore it is not necessary to write anything in the tens column. On multiplying by 3 hundreds, write 1 in the hundreds column. It is not necessary to write rows of 0's. They add nothing to the product. We are now about to see that we can do arithmetic only with whole numbers -- and then correctly place the decimal point. read more