explain how you would estimate to subtrac 189 from 643
189 rounded up to the nearest 100 number would be 200; 200 subtracted from 643 = 443 , 200 - 189 454
400
2,643 minus 100 = 2,543
Front End Estimation can be confusing before you understand it. There are two simple steps for front end estimation: add the digits of the two highest place values, insert zeros for the other place values. Now let's put that into us for your question!189-643 =(1 & 8 are the first two digits for 189 ... 6 & 4 are the first two digits for 643)18_ - 64_ =(Fill in zeros for the place values you have emptied)180-640= -460-460
explain how you would estimate to subtrac 189 from 643
189 rounded up to the nearest 100 number would be 200; 200 subtracted from 643 = 443 , 200 - 189 454
192 minus 189 is 3.
450
200 -189 =11
500
640 - 190 = 450
400
400
1343 - 700 = 643
It equals 1,861. This is how you do the work. 2,005 -189 _____ 1,861
2009 - 1820 = 189