Question

organic whole wheat flour sells in bags weighing 2.915 kilograms. a. how much flour is this when rounded to the nearest tenth? use a place value chart and number line to explain your thinking. b. how much flour is this when rounded to the nearest one? extension: what is the difference of the two answers?

Explanation:

Step1: Round to the nearest tenth

The digit in the tenths place is 9 and the digit in the hundredths place is 1. Since 1 < 5, we keep the digit in the tenths place as it is. So, 2.915 rounded to the nearest tenth is 2.9.

Step2: Round to the nearest one

The digit in the ones place is 2 and the digit in the tenths place is 9. Since 9 > 5, we round up the digit in the ones place. So, 2.915 rounded to the nearest one is 3.

Step3: Find the difference

To find the difference between the two rounded - values, we subtract the smaller value from the larger value. The difference is 3 - 2.9=0.1.

Answer:

a. 2.9
b. 3
Extension: 0.1