Answer: Estimated Kms raced by Roaseanne is 11 Km. Exact Kms raced by Roseanne is 11.55 Km..
Work Step by Step
Here Roseanne raced 2.3 Kms on monday, 4 Kms on wednesday, 5.25 Kms for friday. To find how far she did all together, we need to find the summation of all the race. First lets find estimate with front end rounding. 2.3 (rounds to) 2 4 (rounds to) 4 5.25 (rounds to) 5 Estimated Total Race Kms 2+4+5=11 Now let's find the final exact answer 2.30 (write decimal point 3 and 0) + 4.00 (write decimal point and two 0) + 5.25 ______ 11.55 Exact Total Race Kms 11.55 Kms