Organic, whole-wheat flour sells in bags weighing 2.915 kilograms. How much flour is this rounded to the nearest tenth? How much flour is this rounded to the nearest one? What is the difference of the two answers? Use a place value chart and number line to explain your thinking.

We start with the weight: 2.915 kilograms. Step 1. Rounding to the Nearest Tenth: • In a place value chart, 2.915 is broken down as follows:   • Ones:  2   • Tenths:  9   • Hundredths: 1   • Thousandths: 5 • To round to the nearest tenth, we look at the hundredths digit (1). Because 1 is less than 5, the tenths digit stays the same.   Therefore, 2.915 rounded to the nearest tenth is 2.9. Step 2. Rounding to the Nearest One: • To round to the nearest one, we look at the tenths digit (9). Since 9 is 5 or greater, we round up the ones digit.   Thus, 2 rounded up becomes 3.   So, 2.915 rounded to the nearest one is 3. Step 3. Finding the Difference: • The difference between the two rounded amounts is:   3.0 (rounded to the nearest one) − 2.9 (rounded to the nearest tenth) = 0.1 Number Line Explanation:  Imagine a number line with key points marked. For rounding to the nearest one:   • The midpoint between 2 and 3 is 2.5.   • Since 2.915 is greater than 2.5, it is closer to 3.   For rounding to the nearest tenth:   • We mark points at 2.8, 2.9, and 3.0.   • The cutoff between 2.9 and 3.0 is determined by the hundredths place. Since the hundredths digit in 2.915 is 1 (less than 5), it stays at 2.9.   So on the number line, 2.915 lies in a spot that rounds to 2.9 when considering the tenths, but to 3 when considering the whole number. Final Answers: • Rounded to the nearest tenth: 2.9 kilograms • Rounded to the nearest one: 3 kilograms • Difference: 0.1 kilogram