Question

Use the following area model to multiply 42 x 73

What is the area of rectangles A, B, C, and D?

Answer 1

A=2,800 B=120 C=140 D=6

Explanation:

4*7 is equal to 28, then 40*70 is equal to 2,800.

when you multiply a 2-digit number always multiply the first digit from the first number with the first digit from the second number and think of them as single digits, for example, I don't know how to do 30*40, first, take the 3 and the 4 then multiply them. 3*4 equals 12, then you take the 0s and add them to the number, and now we have 1200! The same goes for 42*73, I hope this helps!

Answer 2

A=2800,B=120,C=140,D=6