Question

problem solving

1. bridget is reviewing a nutrition label. she wants to find the difference between the amount of grams of saturated fat and protein. how many more grams are there of saturated fat than protein? draw decimal models to find the difference.

1. practice use math tools leanne is building a model tower that needs to be 1.42 meters tall. the model currently is only 0.68 meter tall. how many more meters does she need to build in order to finish the model tower? draw decimal models to find the difference.

360 chapter 5 add and subtract decimals

Explanation:

Problem 3 (Assuming typical nutrition label values, e.g., Saturated Fat = 2.5g, Protein = 1.2g for example; but since the label is unclear, we'll use the method. However, for Problem 4:

Step1: Identify the values

We need to find the difference between the target height (1.42 m) and the current height (0.68 m). So we use subtraction: $1.42 - 0.68$.

Step2: Subtract the decimals

Align the decimal points:

$$\begin{align*} 1.42\\ -0.68\\ \hline 0.74 \end{align*}$$

(Decimal models: For 1.42, we can represent 1 whole, 4 tenths, 2 hundredths. For 0.68, 0 wholes, 6 tenths, 8 hundredths. Subtracting tenths: 4 tenths - 6 tenths is not possible, so we borrow 1 from the whole (1 becomes 0, 4 tenths becomes 14 tenths). Then 14 - 6 = 8 tenths. Subtracting hundredths: 2 - 8 is not possible, so we borrow 1 from the tenths (14 becomes 13, 2 becomes 12). 12 - 8 = 4 hundredths. The whole part: 0 (after borrowing) - 0 = 0. So total is 0.74.)

Answer:

(for Problem 4):
She needs to build 0.74 more meters.

(Note: For Problem 3, since the nutrition label's specific values for saturated fat and protein are not clear from the image, we can't compute the exact number, but the method is similar: find the grams of saturated fat (let's say $S$) and protein (let's say $P$), then compute $S - P$ using decimal subtraction and models.)