### Home > MC1 > Chapter 4 > Lesson 4.1.4 > Problem 4-47

4-47.

Refer to problem MC1 2-108 for help if you are having trouble getting started.

What two numbersmultiply to make15 and add together to make 8?

To fill in the second # square, try to determine what plus 4 is equal to 7.

Next, fill in the product square by finding the product of 4 and 3.

3 and 12 complete this diamond.

For parts (c) and (d), follow the steps outlined in part (a). Depending on the problem, you can begin by either subtracting or dividing to find the second #.