Estimated Sum. The step by step calculation help parents to assist their kids studying 3rd or 4th grade to verify the work and answers of estimate the sum by rounding addends to the nearest ten hundred or thousand homework and assignment problems in pre algebra or in number and operations in base ten nbt of common core state standards ccss for mathematics. If we ve rounded one value up and one down the sum we have obtained is a correct estimation.
The actual addition is 37 58 95. In example 4 we got an estimated sum of 30 using the front end strategy and an estimate of 30 4 by rounding to the nearest tenth. We look at the total amount of rounding three things can happen.
Fractions 5 8 and 7 8 are rounded to 6 8 3 4.
Fractions 7 8 are rounded up to 8 8 1. In mathematics summation is the addition of a sequence of any kind of numbers called addends or summands. If we ve rounded one value up and one down the sum we have obtained is a correct estimation. Fractions 7 8 are rounded up to 8 8 1.
