Answer:
You add it in your mind.
Step-by-step explanation:
10,000,000+2,000,000+400,000+30,000
1468 is the answer.
You have to find the volume of the large shape and subtract the volume of the small shape. Write the equation as such:
(10*10*15) -(2*4*4)
1500 -32
1468
10, 20w, 2w, and we are factors of 20w and 40wz