how to do the "partial products"? Confused with this. Can someone explain this method? Example here:
Which are partial products for 89 × 25?

Choose all answers that are correct.

A.
18

B.
40

C.
45

D.
1,600

i know that 89 times 25 is 2225, but that is not a answer.

Question

how to do the "partial products"? Confused with this. Can someone explain this method? Example here: 
Which are partial products for 89 × 25?
 
Choose all answers that are correct.
 
 A.
18
 
 B.
40
 
 C.
45
 
 D.
1,600

i know that 89 times 25 is 2225, but that is not a answer.

anonymous · Answer

i tried Googling it but i am still confused.

anonymous · Answer

Ok, i found that you should calculate 89 as 80+9 and 25 as 20+5. Then what?

anonymous · Answer

Someone please help!