A rectangle has an area of 1,083.88 square millimeters and a height of 34.3 millimeters. What is the length of the base?

Answer 1

1083.88/34.3 = 31.6 ml for the base

use a calculator, it's usually more accurate than trying to do tedious long division

31.6 looks about right, as 30^2 =900, so the division should have a quotient a little over 900

plus check it with the rule of 9's 3+4+3 = 10 1+0=1, 3+1+6 = 10, 1+0=1, 1 times 1 = 1

1+0+8+3+8+8 = 28, 2+8=10, 1+0=1 1=1