Question 1:

To check the problem just click "Check". This will check if your answer is correct, and if you want to do another, you will be given the chance to generate another question.

Solve the following cross multiplication problem by filling in the blank.

This problem accepts both non-rounded answers out to 12 decimal places, as well as rounded answers, and will tell you if your answer was 100% correct, or had to be rounded slightly.

78	=	221
		100