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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
half would be around 94.
189 rounded up to the nearest 100 number would be 200; 200 subtracted from 643 = 443 , 200 - 189 454
189% as a fraction would be 189/100. The factors of 189 are 1, 3, 7, 9, 21, 27, 63, and 189. None of these numbers can be divided into 100 equally.
189
40% of 189 = 40% * 189 = 0.4 * 189 = 75.6
25% of 189= 25% * 189= 0.25 * 189= 47.25
49% of 189= 49% * 189= 0.49 * 189= 92.61