CPM Homework Help : MC1 Problem 3-121

Copy and complete the generic rectangle below. What multiplication problem does it represent and what is the product?

_____

$+5$

_____

$200$

$100$

$+7$

_____

2 by 2 generic rectangle edges labeled as follows: Top edge left, blank, top edge right, + 5. Left edge top, blank, left edge bottom, + 7. Interior area labeled as follows: top left, 200, top right, 200, bottom left, blank, bottom right, blank.

Hint:

You know that $5(\text{something}) = 100$ . What is that something?

Partial Answer 1:

Added to the rectangle: left edge top is 20. A circle around +5 and 100.

Hint 2:

You know that $20(\text{something}) = 200$ . What is that something?

Partial Answer 2:

Circle added around left edge top, 20, top edge left ,blank, and top left interior, 200.

More Help:

Complete the rest of the square using multiplication. Added to rectangle & inside second circle: top edge left is 10.