Write the missing number to make this division correct. 75 divided by what equals 7.5?
One way to find the answer is to use the inverse. What do we multiply 7.5 by to get to 75? Both of these numbers have a seven and a five digit. The seven in 7.5 is worth seven ones, and the seven digit in 75 is worth seven tens or 70. And we know that seven multiplied by 10 is 70. So 7.5 multiplied by 10 equals 75. 75 divided by 10 equals 7.5. The missing number is 10.