3rd grade math
posted by Alex .
How can you use mental math to multiply 800 x 5?

8*5=40
40 add in two zeroes
to get 4000 
Just multiply 8 and 5 you will get 40 when you add two zeros you get 4000.Check your answer on paper, If you wish to

How can you use mental math to multiply 800 times 5

8x5=40
and then add two zeroes to the end of 40 =4000
v_v
 
8x5=40
and then add two zeroes to the end of 40 =4000
v_v 
My name is Jeff.